FreeStyle Libre System FAQs
Answers to all your commonly asked questions
Flash glucose monitoring is a user-friendly way to discreetly obtain glucose readings. A flash glucose monitoring system provides a complete picture showing the current glucose reading plus you can see how glucose levels are changing in a flash by just scanning the reader over the sensor.
What makes flash glucose monitoring system unique is that a quick scan of the reader over the sensor provides a complete picture of your glucose including the current glucose reading, 8 hour history and trend arrow showing if your glucose level is going up, down or staying steady.
What happens if the reader runs out of power? Do I lose glucose readings if the reader runs out of power?
The reader needs to be recharged if it runs out of power. The stored glucose readings on the reader are not lost. The reader should fully charge in approximately 3 hours if the battery is completely discharged.
With normal use, the reader can be used for approximately 7 days before it needs to be recharged. A low battery warning will appear on the reader when it needs to be recharged. There is a battery icon on the reader which will indicate battery life.
Yes, you can get glucose readings through clothing by scanning the reader over the sensor. The reader can capture data from the sensor when it is within 1cm to 4cm of the sensor.
The oldest glucose readings will be lost if the reader is not scanned at least once during an 8 hour period. For example, if you scan the reader over the sensor at 1:00pm and again at 10:00pm, then you will lose glucose data from 1:00-2:00pm.
Is there any chance of overlapping glucose readings if I scan the reader over the sensor multiple times during an 8-hour period?
The reader is smart enough to figure out what data is new with each scan and not double-count any data.
In the UK, the only language available is English.
The reader display timeout is 60 seconds (120 seconds from when a test strip is inserted).
The reader storage temp is -20 °C to 60 °C and the sensor should be stored at 4 °C - 25°C.
You can create up to 12 reminders.
There are 5 standard notes and 6 custom notes that you can create for a total of 11 notes.
Median - is where half the readings fall below the line and half the readings fall above.
25th to 75th Percentile - is where 25%- 75% of the observed sensor glucose readings fall (or the middle 50% of results).
10th to 90th Percentile - is where 10% - 90% of the observed sensor glucose readings fall
The Ambulatory Glucose Profile (AGP) graph, found on several reports, provides a visual reference for changing glucose levels over time. Sensor glucose data of 5 days or more are combined and plotted into a single 24-hr chart. By plotting data this way, you can see patterns of variability that may be common to a specific time of day.
eA1c is an estimated value for HbA1c based on the average sensor glucose over the timeframe selected. eA1c is calculated using a formula from the published reference below*. eA1c is not meant to replace or predict the HbA1c tested in a laboratory. Instead you can use this value to monitor changes to eA1c over time.
* Nathan DM, Kuenen J, Borg R, et al. Translating the HbA1c assay into estimated average glucose values. Diabetes Care . 2008;31:1473-1478.
Consult the software user’s manual or your healthcare professional if you are having difficulty understanding or using the reports.
The FreeStyle Libre flash glucose monitoring system typically offers a Trend Arrow with each glucose reading which tells you which way and how quickly glucose levels are changing. So, at any given time, you not only know what your glucose level is currently, but also which way it is heading. Depending on the direction of Trend Arrow, you can find out if your glucose levels are going up, down or staying steady, facilitating better decision-making.
Traditional blood glucose monitoring provides users with glucose readings that represent distinct points in time. Users do not get information regarding how their glucose levels have been changing, nor do they get information about where their glucose levels are heading. Without such information, it can be easy to miss significant glucose fluctuations - the ups and downs. The FreeStyle Libre system is an innovative way to obtain glucose readings. It allows the user to get their current glucose reading by just scanning the reader over the sensor, and also provides a complete picture of glucose variations. For a complete glycemic picture, scan once every 8 hours.
You can use the built-in meter to check your blood ketone levels using FreeStyle Optium β ketone test strips (available on prescription). You should perform a blood ketone test on your fingertip only. Be sure to read the test strip instructions for use prior to using the built-in meter.
'Easy setup' is for users who use a fixed dose of rapid-acting insulin before meals. 'Advanced setup' is for users who count carbohydrates (in grams or servings) and/or use a correction factor to adjust doses of rapid-acting insulin at meals. The insulin calculator must be set up by a healthcare professional.
No, the insulin calculator can assist you with calculating rapid-acting (meal-time or short-acting) insulin doses only. The insulin calculator must be set up by a healthcare professional.
The insulin calculator utilises settings entered into the insulin calculator during one of two setup modes (Easy or Advanced); this feature requires an understanding of the use of insulin and must be set up by a healthcare professional. Using the settings they enter, the glucose reading from the built-in blood glucose meter and carbohydrate information (in grams or servings) the user provides, the insulin calculator software in the reader calculates a suggested insulin dose.
Yes, the system can calculate a suggested mealtime insulin dose when using the built-in blood glucose meter since it has a built-in insulin dose calculator function.
Please note that this feature only works when using the blood glucose test strip port and needs to be activated by a healthcare professional.
The sensor is approximately 5mm in height and 35mm in diameter. The portion of the sensor that gets inserted under the skin is less than 0.4 mm wide and it's inserted only about 5mm under the skin. In a study conducted by Abbott Diabetes Care, users agreed that inserting the sensor was no more painful than a typical finger prick glucose test*.
*Data on file. Abbott Diabetes Care.
The sensor automatically measures glucose levels every minute and stores readings at 15-minute intervals for 8 hours. When the sensor is scanned by the reader, the sensor automatically transmits 8 hours of data to the reader.
If the sensor is storing glucose readings every 15 minutes, does that mean I will get the same glucose reading if the sensor is scanned again within the same 15 minute interval?
No, you will get the most current reading every time you scan the reader over the sensor.
You can scan as often as you want, but the reading will never change more frequently than every 60 seconds.
To keep the sensor profile small it has a limited storage capacity. To make sure it could hold 8 hours of data (for a typical overnight period).
The sensor is applied on the back of the upper arm with a disposable device called an applicator. When the sensor is applied, a small (5mm) sterile filament is inserted just under the skin, and held in place with a small adhesive pad. In a study conducted by Abbott Diabetes Care, most users agreed that inserting the sensor was no more painful than a typical finger prick glucose test*.
*Data on file. Abbott Diabetes Care.
The disposable sensor is designed to adhere to the back of the upper arm and provide accurate glucose readings for up to 14 days. After 14 days, remove the sensor by peeling off the adhesive pad.
The sensor can only be worn on the back of the upper arm.
The portion of the sensor that gets inserted under the skin is less than 0.4 millimetre wide (1mm is about the thickness of a few strands of human hair) and it’s inserted only about 5mm under the skin, so most people will never feel the sensor while it is being worn. In a study conducted by Abbott Diabetes Care, most users agreed that they did not feel any discomfort under the skin whilst wearing the FreeStyle Libre sensor*.
*Data on file Abbott Diabetes Care
You can take as many glucose readings as you want while the sensor is being worn. In order to get a 24-hour glycemic picture you need to scan at least once every 8 hours.
Yes, the accuracy of the sensor remains consistent for up to 14 days.
A finger prick test using a blood glucose meter is required during times of rapidly changing glucose levels when interstitial fluid glucose levels may not accurately reflect blood glucose levels or if hypoglycaemia or impending hypoglycaemia is reported by the System or when symptoms do not match the System readings.
Yes. The sensor can be worn while bathing, showering, swimming or exercising. The sensor should not be taken below a depth of 1 metre (3 feet) in water, and should not be submerged in water for more than 30 minutes.
Check with airline prior to departure as rules and regulations may change without notice.
After 14 days of wear, the reader notifies you. The time to the end of the sensor wear period is shown on the screen of the reader when you switch it on. After the wear period, the sensor will stop working and should be replaced with a new sensor.
Start a new sensor. The reader will identify that it is a new sensor and ask if you want to start it.
To check the system is working simply switch on the reader and scan over the sensor to get a glucose reading. If for any reason, the sensor does not work, an error message will appear on the reader prompting the user to replace the sensor.
If you have symptoms that do not match the FreeStyle Libre system reading or suspect your reading may be inaccurate, check the reading by conducting a finger prick test using a blood glucose meter. For convenience, there is a built-in blood glucose meter within the reader that can be used for blood glucose readings. If you are experiencing symptoms that are not consistent with your blood glucose readings, consult your healthcare professional.
For full details please refer to the FreeStyle Libre system User Manual.
What happens to the sensor if it is worn when it's warmer or colder than the recommended temperature range?
If the sensor stops working due to extreme temperature, the user will get an error message indicating 'Glucose Reading unavailable'.
Used or unused sensor packaging can go in general waste.
Once the FreeStyle Libre sensor has been placed on the arm, the used applicator (which contains a needle) and the lid can be screwed back together and can be placed in a yellow biohazard bag or sharps box.
The used FreeStyle Libre sensor should be placed in a clinical waste sharps box.
No, the FreeStyle Libre sensor is calibrated during the manufacturing process so you don't have to. The sensor is activated by scanning and then, after a 1 hour warm up period, it starts to record glucose readings automatically.
Abbott Diabetes Care is committed to making its products safe for the user. After the insertion, the sensor and the body need to equilibrate (or settle). We have found through our research that it is not always easy to accurately measure glucose in the body until this equilibration happens. Therefore, we let the system equilibrate for 1 hour to make sure that it is providing accurate glucose readings.
‘Flash’ reflects the fact that users can obtain glucose readings quickly by just scanning the reader over the sensor*. Flash glucose monitoring also provides a flash of insight to people with diabetes and their health care professionals.
*A finger prick test using a blood glucose meter is required during times of rapidly changing glucose levels when interstitial fluid glucose levels may not accurately reflect blood glucose levels, or if hypoglycemia or impending hypoglycemia is reported or the symptoms do not match the system readings.
The FreeStyle Libre reader and the FreeStyle Libre sensor can be exposed to common electrostatic (ESD) and electromagnetic interference (EMI), including airport metal detectors. You can keep your FreeStyle Libre sensor on while going through these.
However, the FreeStyle Libre reader and the FreeStyle Libre sensor should not be exposed to some airport full-body scanners (i.e. x-ray and millimeter radio-wave). To avoid removing your FreeStyle Libre sensor, you should request another type of screening to be performed by the Security Officer.
If in doubt about the type of security scan you are passing through, notify the Security Officer prior to proceeding through the airport security checkpoint.
The LibreView system lets you create clear, easy-to-understand glucose reports and share them with your healthcare professional. It’s free and only takes about a minute to sign up and get started.
To use LibreView, connect your glucose monitor to any Windows computer with an Internet connection, then log in follow the on-screen instructions to upload data. Your glucose data is stored securely in the cloud, where you can share it with your doctor.
The LibreView system is free. There are no initial start-up costs and no subscription payments.
You can create reports that combine data from different Abbott Diabetes Care meters in the LibreView system.
LibreView can be used just to view data, or to upload data. The minimum system configuration required to use LibreView as a viewer is:
Windows 7 SP1, Windows 8.1 or Windows 10 Anniversary update (and higher)
- Display resolution of 1024 x 768 pixels or greater.
- Internet Explorer 11, Firefox release 32.0, or Chrome release 37.0
- 1 Ghz processor (dual/multi-core recommended)
- 2 GB RAM
- Internet connection with 0.5 Mbps download speed.
Mac OS X Yosemite (10.10) or higher
- Display resolution of 1024 x 768 pixels or greater
- Safari release 10.1 or Chrome release 37.0 or higher
- 1 Ghz processor (dual/multi-core recommended)
- 2 GB RAM
- Internet connection with 0.5 Mbps download speed.
We recommend using the most up-to-date version of your browser. Please note, at this time, Microsoft Edge is not a supported browser.
The LibreView software can be used to help you more easily identify trends and patterns in your glucose data. For example, you may find that at certain times of the day your glucose is consistently trending high or low and you can focus on these areas for improvements.
Launch your internet browser (Internet Explorer, Chrome, or Firefox), then:
- For Internet Explorer: locate and select the “gear.” Next, select “About Internet Explorer.” This will display the current version in use.
- For Chrome: locate and select the “stacked bar” setting icon. Then select “Help & About” to see the current version.
- For Firefox: On the menu bar, click the Firefox menu and select “About Firefox.” The version number is listed underneath the Firefox name.
Select the glucose meter icon on the Upload a Meter page. This automatically downloads the latest version of the LibreView Device Drivers.
Yes, your LibreView account is HIPAA compliant and protected by robust encryption. Learn more: Data Management Security
Log in to your LibreView account. Click the Upload button. Then, connect one end of the cable to your device and the other end of the cable to your computer. If this is your first time uploading to this computer, you will be asked to install software that allows your device to communicate with the web-based system.
Note: If you use the LibreLink mobile app to monitor glucose, your data is automatically uploaded to LibreView every time you scan your FreeStyle Libre sensor.
You can email a PDF of your reports to your healthcare team by clicking the Email button when viewing your reports. You can also share with your healthcare professional by linking your LibreView account to their healthcare practice. Click on the navigation icon in the upper right corner of the screen. When the side menu opens, select Account Settings. Then click the My Practices tab and enter your healthcare professional’s Practice ID to share your data. (You will need to ask your healthcare professional for their LibreView Practice ID to be able to link accounts.)
You can share reports with as many people as you like.
Yes, with the LibreView system you are in control of when and how you share your data. If you would like to stop sharing your data with a certain practice (if you switch doctors, for example) log into your LibreView account, and click on the navigation icon in the upper right corner. From the side menu, select Account Settings. Click the My Practices tab and click Remove for the practice with which you would like to stop sharing.
LibreLink is a mobile app developed, maintained and provided by AirStrip which is designed to work with FreeStyle Libre sensors.
LibreLink enables you to carry out routine glucose monitoring using your smartphone and a FreeStyle Libre sensor — there is no need to use a separate meter for routine glucose monitoring.1,2 When you scan the sensor using the app, your glucose data is displayed directly on your smartphone.
Important: You must have a compatible smartphone to download and use the LibreLink app.
1.The LibreLink app and the FreeStyle Libre reader have similar but not identical features. A fingerprick test using a blood glucose meter is required during times of rapidly changing glucose levels when interstitial fluid glucose levels may not accurately reflect blood glucose levels or if hypoglycaemia, or impending hypoglycaemia, is reported by the LibreLink app or when symptoms do not match the LibreLink app readings.
2.The FreeStyle Libre sensor communicates with the FreeStyle Libre reader that started it, or the LibreLink app that started it. A sensor started by the FreeStyle Libre reader will also communicate with the LibreLink app, provided that the LibreLink app is used to scan the sensor within an hour of the sensor starting up.
Go to LibreLink.com to learn more about LibreLink and download the app.
In order to share LibreLink data with your doctor using LibreView, your doctor must set up a LibreView Professional Account and enable the Practice feature. Once this is complete, your doctor can either:
- Send you an email from LibreView inviting you to share data, or
- Provide you with his or her unique Practice ID.
If your doctor sent you an email, you can click on the link in the email to start sharing. If your doctor gave you a Practice ID, you will need to go into LibreView and enter the Practice ID under My Practices in your Account Settings.
If I use both the FreeStyle Libre reader and the LibreLink mobile app, what data will appear in LibreView
LibreView uses only the data from the device that was last used to scan your sensor. You can switch devices from the Available Meters window.
- The FreeStyle LibreLink app is a mobile medical app designed to work with FreeStyle Libre sensors. The app enables you to monitor your glucose using your iPhone or Android phone with a FreeStyle Libre sensor — there is no need to use a separate blood glucose meter for routine glucose monitoring*. When you scan the sensor with a compatible phone that’s running the FreeStyle LibreLink app, your glucose data is displayed directly on that device.
With the app you can:
- View your current glucose reading, a trend arrow, which indicates how your glucose is changing, and the last 8-hours of glucose history
- See glucose reports, including your Ambulatory Glucose Profile, which reveal trends and patterns
- Add notes to track your food, insulin use, exercise, and other events
- Connect to healthcare professionals and caregivers with LibreView and LibreLinkUp
To use the FreeStyle LibreLink app, you must register with LibreView, a cloud-based diabetes management system provided by Abbott and Newyu, Inc. Please see the product labeling for FreeStyle Libre and the FreeStyle LibreLink app for specific instructions on using the different products.
*A finger prick test using a blood glucose meter is required during times of rapidly changing glucose levels when interstitial fluid glucose levels may not accurately reflect blood glucose levels or if hypoglycaemia or impending hypoglycaemia is reported by the FreeStyle LibreLink app or when symptoms do not match the FreeStyle LibreLink app readings.
Your phone should work with the FreeStyle LibreLink mobile app if it meets the following requirements:
- Operating System: Android 5.0 (Lollipop) and higher.
- Hardware: Must have NFC (near field communication) capabilities*
- Operating System: iOS 11 and later
- Hardware: iPhone 7 and later
If you are not sure of your phone specifications, you can also go to Google Play or the App Store on your mobile phone and search for the FreeStyle LibreLink version for your country. If you can’t download the app, it’s probably not compatible with your phone.
NOTE: Customer support is not available for rooted or jailbroken phones.
*If you are not sure whether your phone has NFC, check your phone manual or look in your phone’s settings menu for any mention of NFC. It may be listed either under wireless, network set-up or connect/share.
Yes, the FreeStyle LibreLink app is CE marked.
After you have installed the FreeStyle LibreLink app and accepted the End User License Agreement and the Privacy Notice, you will be asked to create a LibreView account. You must have a network connection in order to complete the account creation process.
Step 1 Fill out required fields
The following fields are required.
- First name
- Last name
- Date of Birth
- Password (Passwords must be at least eight characters and no more than 36 characters. They must contain at least one number, one uppercase letter and one lowercase letter.)
- Confirm Password
Step 2 Tap ‘Create My Account’
When you have entered all your information, tap Create My Account at the bottom of the screen.
Step 3 Finish app setup
Once you’ve created an account, you will be prompted to set up your app. Follow the on-screen instructions to select your target range and set your preferences for logging notes.
Once your app is set up, you can edit your selections at any time by going to the Settings option in the menu.
Note: You can now use the same account information to sign into LibreView or LibreLinkUp. Your data from FreeStyle LibreLink will be automatically uploaded into LibreView whenever you have a network connection.
Abbott Diabetes Care is now offering the FreeStyle LibreLink app as part of the FreeStyle Libre family of products. Like the LibreLink app, the FreeStyle LibreLink app enables patients to use their phone to scan their FreeStyle Libre sensor to help them manage their diabetes. Starting in 2018, the FreeStyle LibreLink app will become the only official app for use with the FreeStyle Libre flash glucose monitoring system. Current LibreLink app users are encouraged to transition to the FreeStyle LibreLink app as soon as possible, since support for the LibreLink app will be discontinued.
The FreeStyle LibreLink app includes several updates and new features in addition to many of the same features that already exist in the LibreLink app:
- Simple text-to-speech capabilities for readings, if enabled
- New sound and vibration settings for scans (Android)
- Ability to log insulin in 0.1 units
- Support for 26 total languages
After a transition period, the LibreLink app will no longer be supported or maintained. To continue using an active sensor with the new FreeStyle LibreLink app, current LibreLink app users should carefully follow the onscreen instructions in the LibreLink app to transfer data to the FreeStyle LibreLink app, once it’s installed. After a transition period, the LibreLink app will be removed from the Google Play Store. Please contact customer service if you need assistance transitioning from the LibreLink app to the FreeStyle LibreLink app.
No, the FreeStyle LibreLink app and the LibreLink app are the only apps that have been tested by Abbott Diabetes Care to be compatible with FreeStyle Libre sensors. The FreeStyle LibreLink1 and LibreLink apps2 were developed to ensure compliance with local regulations, including safety and performance requirements in accordance with the intended use. Any product that is intended to be compatible with FreeStyle Libre sensors would also need to comply with these regulations as well.
1. Use of the FreeStyle LibreLink app requires registration with LibreView, a service provided by Abbott and Newyu, Inc.
2. LibreLink is a mobile application, developed and provided by AirStrip. Use of LibreLink requires registration with LibreView, a service provided by Abbott and Newyu, Inc.
The thickness of the case can also make a difference. If your case is very thick on the back, it could prevent the NFC signal from reading the sensor.
NFC is the wireless communication technology that enables your FreeStyle Libre sensors to wirelessly transmit data to another device.
For Android users: Your Android phone must have NFC capabilities and NFC must be enabled. Many of the latest Android phones support NFC. Check your phone's manual or go to the phone’s Settings menu and look for settings related to 'NFC', 'Connections', 'Sharing', or 'Wireless and Networks'.
For iPhone users: You must have an iPhone 7 or higher running iOS 11 or higher to utilize the NFC capability needed to scan the FreeStyle Libre sensor.
Yes, with your permission, the app is able to share glucose data with certain other apps. View the Share menu within the FreeStyle LibreLink app to see what other apps are available for sharing in your region.
The app has the same indications for use as the FreeStyle Libre system.
If you have used the FreeStyle Libre reader before, you may notice differences in scan performance upon scanning a sensor with a mobile phone. Your scanning technique may need to change because NFC performance varies by phone make and model.
For Android phones:
- Make sure NFC is enabled on your phone.
- If you use other NFC apps like Samsung’s S-Health, you must launch FreeStyle LibreLink each time before you scan. Or, if you uninstall the other NFC apps, you should be able to scan your sensor whenever your phone is unlocked.
- Hold the BACK of the phone against the sensor (this can be done over clothing) and slowly move the phone around until you hear the first tone, then hold the phone still until you hear the second tone. (If sounds are turned off on your phone, you will need to turn them on to hear these tones).
- The first tone indicates that the phone and the sensor have established an NFC connection.
- The second tone indicates that the phone has successfully scanned the sensor.
- Your phone will also vibrate when the sensor has been scanned.
- Open the FreeStyle LibreLink app
- Tap the “scan button” on the home screen (it may say “Start a New Sensor” or “Check Glucose” or the sensor icon the top right corner of most of the app screens
- When the modal screen that reads, “Ready to Scan” appears, hold the TOP of your iPhone near your sensor.
- Your phone will vibrate slightly when the sensor has been scanned.
Once the scan is completed successfully, the app will display your current glucose reading along with the last eight hours of glucose history and an arrow indicating the direction in which your glucose is going.
If you are unable to get a glucose reading, or if you receive an error message, go to Error Messages and Troubleshooting.
You may or may not have to remove your phone case – it depends on the material that the case is made from, how thick the case is, and how well your phone’s NFC antenna works. If your phone case is made from plastic or silicone or another non-conductive material, you will probably be able to scan the sensor without removing the case. If the case is aluminum, metal or anything else that has a conductive surface, you may need to remove the case before scanning your sensor. The thickness of the case can also make a difference. If your case is very thick, it could prevent the phone from scanning the sensor.
Yes. The app was developed using the same technology that is in the FreeStyle Libre reader for receiving and processing glucose data, so it can also be used for routine glucose monitoring. The app can be used instead of or in combination with the FreeStyle Libre reader.
There’s no need to use a separate blood glucose meter for routine testing.* The app allows you to get glucose results as often as you like by simply scanning your FreeStyle Libre sensor with your phone. However, a fingerprick test using a blood glucose meter is required during times of rapidly changing glucose levels when interstitial fluid glucose levels may not accurately reflect blood glucose levels, if hypoglycaemia or impending hypoglycaemia is reported by the sensor, or when symptoms do not match the sensor readings.
*The FreeStyle LibreLink app and the FreeStyle Libre reader have similar but not identical features. A fingerprick test using a blood glucose meter is required during times of rapidly changing glucose levels when interstitial fluid glucose levels may not accurately reflect blood glucose levels or if hypoglycaemia or impending hypoglycaemia is reported by the sensor or when symptoms do not match the sensor readings.
If you want to use the reader and the app on the same sensor, follow these steps:
- You MUST use your reader to start a new sensor. A sensor started with the app cannot be used with the FreeStyle Libre reader.
- Once the sensor is started with the reader, open your app and scan your sensor with the app at any time
- Once the sensor has warmed up, you can use either the app or the reader to check glucose for up to 14 days.
- Scan the sensor with the reader or app within an 8-hour time period to avoid gaps in data
Please note that if you use both a reader and the app on the same sensor, data will NOT be transferred between the devices. For example, if you use the reader for a few days and then your app for a few days, you will see gaps in your glucose data which will affect your reports. It is important to continue scanning your sensor with either the app or the reader every eight hours so you and your healthcare professional can get a complete picture of your glucose trends and patterns.
The FreeStyle LibreLink app is intended to be used with only one sensor (and one person) at a time. Each app account is associated with one person. However, people who use the FreeStyle LibreLink app can connect with their caregivers if they are using a separate app called LibreLinkUp. LibreLinkUp allows caregivers to remotely monitor glucose readings performed by their love ones.
Yes. People with diabetes can use FreeStyle Libre sensors with the app to better understand the impact of actions like eating, exercise, and taking insulin based on their glucose levels. They can also make day-to-day therapy decisions when using the app with a FreeStyle Libre sensor, including insulin dosing decisions, based on guidance from their healthcare professional.
Yes. If you use an Android phone, you may need to go to your phone’s settings and reactivate NFC when your phone is in airplane mode. You can scan with your iPhone in airplane mode by tapping one of the scan buttons in the app to put it in a scan ready state.
Wi-Fi or a mobile data connection are only required for initial app setup (downloading / installing the app, creating an account, or signing in) and sharing your glucose information with your care team or with other connected apps. The app does not require a Wi-Fi or a mobile data connection to scan your sensor or to record your current glucose readings. During periods when your phone is operating in a disconnected state, your data will only be uploaded to LibreView after a Wi-Fi or mobile data connection is restored.
No, the FreeStyle LibreLink app is meant to be used as often as you like and should not have a noticeable effect on battery life beyond your normal usage patterns.
If your phone battery dies, charge your phone to continue using the FreeStyle LibreLink app. Your data will not be lost if the phone battery dies and you can scan the sensor while the phone is being charged..
The FreeStyle LibreLink app is not supported on rooted Android phones or jailbroken iPhones.
After installing the FreeStyle LibreLink app, tap Sign In. Then, tap Forgot Password. Enter the e-mail address that was used to create the account and follow the on-screen instructions. You will receive an e-mail with a link to reset your password. Follow the link to create a new password, then sign into your account using your new password.
he FreeStyle LibreLink app is currently available in the following languages:
Chinese – Simplified
Chinese – Traditional
English – United Kingdom
English – United States
French – Canada
French – France
Portuguese – Brazil
Portuguese – Portugal
Spanish – Latin America
Spanish – Spain
Spanish – United States
Note: The FreeStyle LibreLink app is displayed in the same language as your phone’s operating system language. If you wish to use the FreeStyle LibreLink app in a different language, choose from one of the supported languages in your phone’s system settings. The FreeStyle LibreLink app will update the next time it is opened. If the FreeStyle LibreLink app doesn’t support the language set on your phone, the app will display text in English (US).
The FreeStyle LibreLink app can be installed from Google Play (for Android) and from the App Store (for iOS).
You should search for the app associated with your country to ensure you get the right settings based on your location. Each app has a two-letter country code at the end of the app name. Make sure to install the app for your country.
If you are having trouble finding the right app for your country, check your Google or iTunes account settings and ensure your account is associated with the correct country. If you are still having trouble finding the right app, try contacting Customer Service.
The app will display a clock icon on the glucose graph to indicate when there has been a time change. It is necessary to use the correct time for accurate reports. If your phone’s time is not set to update automatically, you will need to update your phone’s time settings in order to continue using the app.
Sharing: Reports in the FreeStyle LibreLink app can be shared directly from the phone. You can connect the reader to the computer with a USB cable to upload data.
Viewing: The reader features a simple color touchscreen. Graphs are displayed in more color and higher resolution in the app.
- Notes: You can add notes in the reader within 15 minutes of a glucose reading. The app allows you to add and view notes at any time in the Logbook.
- Text to Speech: If enabled in the app, you can hear the glucose reading with the unit of measure and trend arrow direction after each scan.
- Reports: The reader and the app use the same calculations to create glucose reports. Compared to the Reader, reports in the app will have more color, details, and interactivity. The app can also display an estimate of your A1c, in addition to basic stats about your glucose history in the last 24 hours.
- Reminders: The app allows you to easily set custom reminders, as well as an 8-hour timer that resets every time the sensor is scanned. App notifications on your phone must be enabled to see reminders.
- Other: The reader has an insulin calculator and a port for test strips, so it can be used both for scanning sensors and blood glucose readings.
The app includes a series of reports that highlight your glucose trends and patterns. From the main menu select the report you wish to see.
- Daily Patterns: A graph showing the pattern and variability of the sensor glucose readings over a typical day. Includes the median, 25th -75th percentile, and 10th-90th percentile range of the glucose readings.
- Time in Target: A graph showing the percentage of time the sensor glucose readings were above, below, or within the Target Glucose Range.
- Low Glucose Events: Information about low glucose events measured by the sensor. A low glucose event is recorded when the sensor glucose reading is lower than 3.9 mmol/L (70 mg/dL) for longer than 15 minutes.
- Average Glucose: Information about the average sensor glucose readings for different periods of the day.
- Daily Graph: A graph of the sensor glucose readings by day.
- Estimated A1c: Estimate of A1c (HbA1c) based on sensor glucose data from the last 90 days. A1c can be used as an indicator of how well glucose levels have been controlled and may be used to monitor a diabetes treatment regimen.
- Sensor Usage: Information about how often the sensor is scanned.
A minimum of 5 days of sensor data is required for an estimated A1c to be calculated.
You can share glucose data with your healthcare professional or a loved one by texting or e-mailing a screenshot of a mobile report directly from the FreeStyle LibreLink mobile app. Open the main menu, then tap the name of the report under Reports and then tap the sharing icon on the bottom of the report screen.
This will bring up a menu of different apps on your phone that can be used to share pictures. Tap the icon for the app you’d like to use, the follow the process for sharing that screen. You’ll be sharing a static screenshot of your report.
LibreView is a cloud-based diabetes management system provided by Abbott and Newyu, Inc. LibreView provides a secure repository for data from your FreeStyle LibreLink app, and allows you to easily share your glucose data with your healthcare professional or others, if you wish. Data is automatically* uploaded to LibreView when your phone is connected to the Internet.
*The user must be connected to the internet in order for their glucose data to automatically upload to LibreView.
The app stores your account information, glucose data, notes, and sensor information within the app on your phone, so it is your responsibility to limit access to your phone to protect personal information. The app also automatically uploads this data in LibreView, a secure cloud-based data repository. Please read the Privacy Notice for more information.
If you lose your phone, download the app again on a compatible phone and sign in with your account information. If you have an active sensor and need to reinstall the app, when you sign into your existing account, you can continue using your active sensor until the end of its useful life. You will not be able to view historical data in the new installation of the app, but this data will be available in LibreView.
No, your glucose data from the FreeStyle LibreLink app will not be synced with FreeStyle Libre desktop software. The FreeStyle LibreLink app data is only stored by and visible through LibreView.
LibreLinkUp is a companion app to the FreeStyle LibreLink app that allows your scanned glucose readings to be automatically shared with your caregivers.
The person wearing the FreeStyle Libre sensor uses the FreeStyle LibreLink app and the parent or caregiver uses the LibreLinkUp app.
To add a LibreLinkUp app connection, simply tap Share (or Connected Apps) in the main menu on the FreeStyle LibreLink app, select LibreLinkUp in the list of available sharing apps, and follow the on-screen instructions.
Both you and your caregiver must have a network connection to share and receive glucose readings.
You can learn more about LibreLinkUp by visiting www.librelinkup.com.
If you have any questions about the app or your data, including questions on how to close your LibreView account, go to FreeStyleLibre.com for customer support contact information.
You can call the Digital Hotline 0800 612 3006 Monday to Friday 09:00 – 18:00
The FreeStyle LibreLink app is not currently compatible with Apple Watch. The FreeStyle LibreLink iOS app requires an iPhone 7 or higher running iOS 11 or higher to scan the FreeStyle Libre sensor. Please refer to the Smartphone Compatibility Guide for further details.
The app includes navigation menu to access different features within the app.
The Android app has a main menu and an overflow menu.
The iOS app only has a main menu, but the same information is included.
Tap the 'three lines' icon in the upper left to open the main menu.
The main menu will open to reveal the following options. Tap each item to navigate to that area.
- Home — The home screen shows glucose data from the most recent 24 hours.
- Logbook — All your sensor glucose results and notes related to food, insulin, exercise and other activities are stored here.
- Reminders — Lists your reminders and gives you options to add, edit or delete reminders.
- Reports — Various charts and graphs optimized for your mobile phone. Tap the name of a specific report (such as ‘Daily Graph’) to view that screen.
Overflow menu (Android only. iOS app includes these items in the main menu)
Tap the 'three dots' icon in the upper right of the screen to open the overflow menu.
The overflow menu will open to reveal the following options. Tap each item to navigate to that area.
- Settings — View and edit target glucose range carbohydrate units, and Text-to-Speech settings. You can also view your glucose unit of measurement.
- Account — View and edit the name and username (e-mail address) associated with your account.
- Change Password — Reset your LibreView password.
- Help — Provides links to online support for the mobile app, the tutorial on how to apply a sensor, and access to your app’s event log which may be used by Customer Support for troubleshooting.
- About — Information about the version of the app, your last three sensors, and your phone model – all of which are helpful for troubleshooting.
Before you can get glucose readings from a new FreeStyle Libre sensor using the FreeStyle LibreLink mobile app, the sensor must be started with the app or the FreeStyle Libre reader and given time to warm up.
Important: You can use either the FreeStyle LibreLink app or the FreeStyle Libre reader during the same sensor session. If you want to use both devices, you must start the sensor with the Reader. See “Using the FreeStyle LibreLink app and the Reader with the same sensor” for more information.
Step 1 Set up
Make sure that your sensor is applied to the back of your upper arm, the app is correctly installed on your phone, you have completed the set-up process, and your phone is on and unlocked.
Step 2 Scan the sensor
The following are important notes to keep in mind when scanning a sensor:
FreeStyle LibreLink uses the Near Field Communication (NFC) capabilities of your phone to communicate with your FreeStyle Libre sensor.
If you've used the FreeStyle Libre reader before, you may notice differences in scan performance upon scanning a sensor with a mobile phone. Your scanning technique may need to change because the NFC performance of phones varies by make and model.
For Android phones:
Hold the back of your smartphone near the sensor (this can be done over clothing) and position the NFC antenna over the sensor. Do not move the smartphone until you hear the first tone and/or feel a vibration. This indicates your smartphone and sensor have established an NFC connection.
Continue holding your smartphone near the sensor until you hear a second tone and/or feel a vibration. This completes the scan.
Open the app
Tap the “scan button”
You can either tap the blue box on the Home Screen or the icon at the top right.
If the Ready to Scan dialog disappears, push the scan button again.
NFC is now activated and your iPhone is ready to scan the Sensor.
Hold the top of your iPhone near the sensor (this can be done over clothing). Do not move your iPhone until you hear a tone and/or feel a vibration. This completes the scan.
Once you determine the location of the NFC antenna on your phone, you should be able to reliably scan your sensor by holding that area of your phone against your sensor.
In addition to proximity and orientation, other factors can affect NFC performance. For example, a bulky or metallic phone case can interfere with the NFC signal.
After you start the sensor, you will see a countdown message on the screen that tells you that the sensor has been started successfully and is warming up.
Step 3 Wait
The sensor needs to warm up before it is ready for use.
Step 4 Your sensor is ready!
If notifications are enabled, you will see a notification when the sensor is ready. You may begin scanning the sensor with your phone to get your current glucose readings, using the same method that you used to start the sensor.
When you scan a FreeStyle Libre sensor with the LibreLink mobile app, a screen (“My Glucose”) will be displayed with your current glucose, a glucose trend arrow indicating which way your glucose is going, and a graph of your current and stored glucose readings.
This number indicates the glucose value from your latest scan. This area will change color depending on whether your glucose is high (orange), low (red), within the target range (green) or between the target glucose range and high or low glucose level (yellow).
Glucose trend arrow
The glucose trend arrow gives you an indication of the direction your glucose is going.
- Glucose is rising quickly - More than 0.1 mmol/L (2 mg/dL) per minute
- Glucose is rising - Between 0.06 - 0.1 mmol/L (1-2 mg/dL) per minute
- Glucose is changing slowly - Less than 0.06 mmol/L (1 mg/dL) per minute
- Glucose is falling - Between 0.06 - 0.1 mmol/L (1-2 mg/dL) per minute
- Glucose is falling quickly - More than 0.1 mmol/L (2 mg/dL) per minute
Note: The glucose trend arrow may not always appear with your reading.
The FreeStyle Libre sensor automatically captures glucose readings throughout the day and stores up to eight hours of data. Each time you scan the sensor, the most recent eight hours of data is displayed in this graph.
Your target range is shown as a solid, light green band on the graph. You can adjust the target range by going to Settings in your app.
Each icon that appears here represents a note that you logged in the app, and when it was logged. There are icons for food notes, insulin notes, exercise notes, and other notes.
Add a note
Tap this button to create a new food, insulin, activity or other type of note. All your notes will be stored in the Logbook feature of your mobile app.
Notes about food, insulin, and exercise can be saved in your FreeStyle LibreLink mobile app. You can save notes in a few different ways.
To save a note with a glucose reading, tap the Add Note button at the bottom of the My Glucose screen. See the step-by-step instructions below.
If you would prefer to add a note directly into the Logbook, visit “Using the Logbook” for more information.
Step 1 Scan Sensor
Using your mobile device, scan a FreeStyle Libre sensor. If you have difficulty scanning the sensor, visit Error Messages and Troubleshooting for more information.
Step 2 Tap ‘Add Note’
From the My Glucose screen, tap the Add Note button.
Step 3 Select type of note
Tap the tick box next to the type of note you would like to create. If you would rather not select a category, you can skip this step and instead type your note in the Comment field.
Step 4 Add note details (optional)
Enter information about your note in the fields provided. Repeat Steps 2 and 3 for all note types that you would like to create.
Step 5 Tap ‘Done’
Tap Done to save your note and return to the My Glucose screen. An icon corresponding with the note types added will be displayed above the glucose graph.
To edit the note you have just added, tap the Edit Note button at the bottom of the screen.
The reports in the FreeStyle LibreLink app give you insights into your glucose variability, and display trends and patterns associated with your glucose management. They use the same calculations as the reports in the FreeStyle Libre reader.
Reports are accessed from the Main Menu by tapping on the icon in the top left corner of the screen.
Tap the “sharing” icon on any report screen to choose how to share a screenshot of that report. Tap the “information” icon to view a description of the report.
Information about the average of your sensor glucose readings. The overall average for the selected time period is displayed below the graph. The average is also shown for different periods of the day. Readings above or below your target glucose range are yellow, orange, or red. Readings in range are green.
A graph of your sensor glucose readings by day. The graph shows your target glucose range and symbols for notes you have entered. The graph will scale to 27.8 mmol/L (500 mg/dL) to accommodate glucose readings above 21 mmol/L (350 mg/dL).
- You might see gaps in the graph during times when you have not scanned at least once in 8 hours.
- The clock symbol may appear indicating a time change. Gaps in the graph may result or glucose readings may be hidden.
A graph showing the pattern and variability of your sensor glucose readings over a typical day. The thick black line shows the median (midpoint) of your glucose readings. The light blue shading represents the 10th - 90th percentile range of your glucose readings. Dark blue shading represents the 25th - 75th percentile range.
Note: Daily Patterns needs at least 5 days of glucose data.
Time in Target
A graph showing the percentage of time your sensor glucose readings were above, below, or within your target glucose range.
Low Glucose Events
Information about the number of low glucose events measured by your sensor. A low glucose event is recorded when your sensor glucose reading is lower than 3.9 mmol/L (70 mg/dL) for longer than 15 minutes. The total number of events is displayed below the graph. The bar graph displays the low glucose events in different periods of the day.
Your estimated A1c level (also called HbA1c) is based on available Sensor glucose data from the last 90 days. The more data available, the better your estimation will be. However, the estimated level may not match your A1c measured in a laboratory*. A1c can be used as an indicator of how well your glucose levels have been controlled and may be used to monitor your diabetes treatment regimen.
*The formula is based on the published reference, which compared average sensor glucose and laboratory-measured A1c:
A1c% = (Avg SGmmol/L + 2.59)/1.59
A1c% = (Avg SGmg/dL + 46.7)/28.7
* Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ for the A1c-Derived Average Glucose (ADAG) Study Group: Translating the hemoglobin A1c assay into estimated average glucose values. Diabetes Care 2008, 31:1473-8. And, Sacks DB. Measurement of Hemoglobin A1c: A new twist on the path to harmony. Diabetes Care 2012, 35:2674-2680.
Information about how often you scan your sensor. This includes the total number of scans, an average of how many times you scanned your sensor each day, and the percentage of possible sensor data recorded from your scans.
LibreView is a cloud-based diabetes management system provided by Abbott and Newyu, Inc. LibreView provides a secure repository for data from your FreeStyle LibreLink app, and allows you to easily share your glucose data with your healthcare professional or others, if you wish. Data is automatically uploaded to LibreView when your phone is connected to the Internet.
To see data from FreeStyle LibreLink in LibreView, follow these steps:
From your web browser, navigate to www.libreview.com
Sign into the same account that you created when you installed and set up you FreeStyle LibreLink app. This is your LibreView account.
Click on the droplet icon in the top left of your screen.
Click on “View Full Reports”
You can change report settings, view data from other glucose meters, export data, and set up sharing with your healthcare professional through LibreView. Check out the LibreView Quick Start Guide at libreview.com for more information.
Note: The FreeStyle LibreLink app does NOT work with the FreeStyle Libre Software.
The Logbook feature in the LibreLink mobile app enables you to review your previous glucose readings and add notes on meals, exercise, insulin intake and more. You can access the Logbook by opening the main menu and tapping Logbook.
Step 1 Open the main menu
Tap the navigation icon in the upper left corner to open the main menu.
Step 2 Go to Logbook
Tap the Logbook option.
Step 3 Choose a date
The Logbook defaults to the current day. To choose a different day, use the Date Picker button next to the displayed date.
Tap a date highlighted in bold. Days without bold numbers do not contain any Logbook entries.
Step 4 Choose an entry
Browse the list to find the entry that you are looking for.
Step 5 Open the entry
Tap any entry from the list to open it. If there are already notes for this entry, you can tap the Edit Note button to make changes. You can do this with a note you have attached to a glucose reading, as well as a note entered directly into the Logbook that is not attached to a glucose reading.
To add a note to an existing logbook entry that has no prior notes, open that logbook entry and tap the Add Note button. Follow the same process as you would for adding a note to a glucose reading.
To add a note independent of a logbook entry:
Step 1 Find date
Navigate to the day to which you would like to add the note.
Step 2 Tap ‘Add Note’
Tap the Add Note button.
Step 3 Set time
Then set the time of the note. Tap the Done button.
Step 4 Add note
Follow the same process as you would for adding a note to a glucose reading.
You can create single or repeating reminders to help you remember things like checking your glucose or taking insulin. There is one default reminder to help you remember to scan your Sensor. This Scan Sensor reminder can be changed or disabled but cannot be deleted.
There are other reminders that are event-driven:
- A reminder to check glucose again after a low glucose reading (this is an optional reminder that you can set after you receive a low glucose alert).
- A reminder to check glucose again after a high glucose reading (this is an optional reminder that you can set after you receive a high glucose alert).
- A reminder to scan your sensor if you have not scanned in at least 8 hours. This is the one and only default reminder. This timer reminder can be changed from 1-12 hours and can be disabled but not deleted.
To delete a custom reminder, open the main menu, then go to Reminders, choose the reminder that you would like to delete and swipe to the left to delete the reminder.
Note: The default 'Scan Sensor' reminder cannot be deleted, but it can be disabled if you would prefer not to use it.
You can disable a reminder without deleting it by tapping the blue and grey toggle on the Reminders main screen.
To edit the name, time or frequency of a reminder, open the main menu, then go to Reminders, choose the reminder you would like to edit and make your changes.
Note: You can edit the time interval of the default 'Scan Sensor' reminder and/or turn it off, but you will not be able to edit its name or delete it.
Text to Speech is an optional feature of the FreeStyle LibreLink app. When the feature is turned on, your glucose reading and trend arrow will be read aloud when you scan your sensor. This may be useful if you are distracted while scanning, or just want audible confirmation of your glucose reading.
This feature is default turned off in the app. To turn it on, go into the Settings menu, select Text to Speech, and turn the feature on.
Note: the Text to Speech feature only reads aloud your glucose reading and trend arrow. Always review the My Glucose screen to get complete information. Remember that Text to Speech inherits the volume settings on your smartphone. If your smartphone volume is turned off, you will not hear the glucose reading read aloud.
When you set up your app, you’ll also set the target glucose range. This is used on your glucose readings graphs, in reports, and in calculation of your Time in Target.
After you set up the app, you can edit your target glucose range in the Settings menu.
If you don’t know your target glucose range, check with your healthcare professional.
When you set up your app, you’ll also set your carbohydrate (carb) units. Some people measure these in grams, others measure in servings. The app lets you log your carb intake using either of these methods.
After you set up the app, you can edit your carbohydrate units in the Settings menu.
If you don’t know your carbohydrate units or your serving size, check with your healthcare professional.
You can edit the LibreView account you created in app setup by going to the Settings menu.
You must have a network connection to view or edit your LibreView account.
To edit your account information, you must confirm your password.
To change your password, you must enter your current password, then the new password. Passwords must be at least eight characters and no more than 36 characters. They must contain at least one number, one uppercase letter and one lowercase letter.
Note: If you edit your LibreView account settings, remember that these will be the new account settings you will use to sign into LibreView or LibreLinkUp.
The DVLA (Driver and Vehicle Licensing Agency) requires all drivers to monitor your glucose levels.
In February 2019, the DVLA updated their regulations to include Group 1 drivers to use Flash Glucose Monitoring systems for the purposes of driving. Drivers must not actively use their glucose monitoring system whilst driving a vehicle, instead you must pull over in a safe location before checking your device. Drivers using the FreeStyle Libre Flash Glucose Monitoring system must get a confirmatory finger prick glucose level in the following circumstances:
- If your glucose level is 4.0mmol/L or below.
- If you have symptoms of hypoglycaemia.
- If your glucose monitoring system gives a reading that is not consistent with your symptoms.
- If you are aware that you have become hypoglycaemic or have indication of impending hypoglycaemia.
- During times of rapidly changing glucose levels
Group 2 drivers must continue to use finger prick testing for the purposes of driving. Flash Glucose Monitoring systems are not legally permitted for the purposes of Group 2 driving.
For the most up to date requirements you can visit the website.
We welcome NHS England’s announcement to increase access to Abbott’s FreeStyle Libre technology for patients who meet the NHS clinical guidelines from April 2019. Years of clinical and real world evidence show that when people use sensor technology, they have both short and long term benefits to their diabetes control. When Abbott set out to develop FreeStyle Libre, cost—and therefore access—were barriers that we wanted to overcome. FreeStyle Libre addresses this issue making sensor technology accessible for healthcare practitioners and people with diabetes. Our goal to deliver reimbursed access of Abbott’s FreeStyle Libre system to insulin-using people with diabetes continues and we thank the wider diabetes community for their continued support. We will be working with NHS England over the coming weeks and months and more details will be shared in due course.
This announcement means that from the 1st November 2017, the FreeStyle Libre sensor is available on prescription via the NHS, subject to suitability. In the first instance, you should go and speak to the Health Care Professional who normally treats your diabetes to discuss suitability for you and availability in your area.
If you are given a prescription for the FreeStyle Libre sensor you will fulfil it in the same way as your other medications and supplies via a pharmacy from the 1st November, 2017.
The FreeStyle Libre reader is not available via prescription and will be provided free of charge via a Health Care Professional from 1st November 2017, based on suitability and availability in your area.
The FreeStyle Libre system will still be available to purchase on www.freestylelibre.co.uk
The FreeStyle Libre sensor will not be available on prescription until 1st November 2017 in England, Wales, Northern Ireland and Scotland. Your clinic or GP may not have information about the FreeStyle Libre system until after 1st November 2017.
Availability of the FreeStyle Libre system will be based on an individual’s suitability and local guidance.
To be able to get the FreeStyle Libre sensors on prescription it needs to be approved by your clinical commissioning group/ health board, your Clinic or GP may not be able to prescribe the FreeStyle Libre sensors if it is not approved.
To be able to receive the FreeStyle Libre sensors on prescription it needs to be approved by your local clinical; commissioning group or health board. Your Clinic or GP many not be able to prescribe the FreeStyle Libre sensors if it is not approved. Availability of the system will be based on individuals’ suitability
To be able to receive the FreeStyle Libre sensors on prescription it needs to be approved by your local clinical commissioning group or health board. Your Clinic or GP many not be able to prescribe the FreeStyle Libre sensors if it is not approved. Availability of the system will be based on individuals’ suitability.
I have previously been advised against using the FreeStyle Libre system by my diabetes specialist. Should I be considering it now it has NHS support?
We recommend you take the opportunity to discuss this matter with your healthcare professional again, at your next appointment. Availability will be subject to suitability and availability in your area.
We strongly recommend that you check with your local guidance as to whether the FreeStyle Libre system has been approved for use in your area.