FLwatch displays blood glucose readings from Abbott FreeStyle Libre 2, Libre 3 and Libre 3+ sensors, as well as Dexcom G6 / G7 / ONE+ sensors, on your iPhone and Apple Watch.
Glucose data can be received through the LibreLinkUp cloud, Dexcom Share, or a direct Bluetooth connection to Libre 3 and Libre 3+ sensors.
Workout mode is available with every supported CGM provider. Follow your glucose graph during exercise and set a workout-specific low-glucose alert to help you notice when your glucose falls.
With Libre 3 and Libre 3+, direct-to-watch Bluetooth support lets you leave your iPhone behind during exercise. Start a workout in FLwatch to receive sensor readings directly on your Apple Watch.
Record insulin doses and view insulin-on-board and insulin activity graphs.
With Apple Watch support, widgets, Live Activities, and configurable glucose and sensor alerts, your glucose data is easily accessible across your Apple devices.
FLwatch is free and open source.
FEATURES
Glucose Monitoring
• Blood glucose graph on iPhone and Apple Watch
• Interactive chart on iPhone — tap to inspect individual readings
• Optional calibration offset for directly connected Libre 3 and Libre 3+ sensors
• Check your current glucose and trend using Shortcuts or Siri
• Optional always-on display mode for quick viewing
CGM Providers
• Direct Bluetooth connection to Libre 3 and Libre 3+ sensors
• LibreLinkUp cloud
• Dexcom Share
Alerts
• Configurable low and high-glucose alerts on iPhone, Apple Watch, and CarPlay
• Additional critical-low and signal-loss alerts for directly connected Libre 3 and Libre 3+ sensors
• Libre 3 and Libre 3+ warm-up status, remaining sensor life, and expiry and replacement notifications
• Optional critical delivery and individual Do Not Disturb times
Insulin Tracking
• Record insulin doses on iPhone, or with Shortcuts and Siri on iPhone and Apple Watch
• Basic carbohydrate and insulin calculator using portion size and a configurable insulin-to-carbohydrate ratio
• Insulin on Board (IOB) calculation
• Supports rapid-acting and fast-rapid-acting bolus insulins
• Insulin on board graph
• Insulin activity graph
Widgets, Live Activities and CarPlay
• iOS Home Screen widgets, with and without graphs
• Lock Screen widgets
• StandBy widgets for bedside view
• Live Activities for quick glucose updates
• CarPlay view showing current glucose and IOB
• Glucose graphs in CarPlay through widgets and Live Activities
Apple Watch
• Native watchOS app
• Workout mode with glucose monitoring and configurable low-glucose alerts for all supported CGM providers
• Direct-to-watch Bluetooth readings from Libre 3 and Libre 3+ during workouts
• A wide range of widgets and watch face complications
• Glucose graph directly on the watch
• On watchOS 11 or later, Live Activities can be mirrored to the Smart Stack
For the best direct-to-watch connection, wear your watch on the arm closest to the sensor. Connection drops can still occur and interrupt readings.
Data Sharing
• Export glucose readings and recorded insulin doses to Apple Health
• When using a direct Libre 3 or Libre 3+ Bluetooth connection, export glucose readings and recorded insulin doses to your own Nightscout server
MORE INFORMATION
For documentation, feature details, and the open-source code, visit:
https://flwatch.app/
DISCLAIMER
Not for treatment decisions.
The information provided by this app and its extensions must not be used for treatment or insulin dosing decisions. Always rely on your glucose monitoring system and consult a healthcare professional when making medical decisions.
TRADEMARK NOTICE
All product names, trademarks, and registered trademarks are the property of their respective owners. Their use here is for identification purposes only and does not imply affiliation with or endorsement by the trademark holders.
This app is not affiliated with or endorsed by Abbott Diabetes Care Inc. or Dexcom Inc.
After jumping through the hoops necessary to install get my blood sugar on my watch Abbott upgraded my CGM to LIBRE 3 plus and then they changed the app as well. All of the work needed to install Gluroo and Nightguard through LIBRE link up was now down the tubes and the new Abbot changes prevented me from reinstalling. With some trepidation I opted to try FLwatch. All went well but the set up wouldn’t allow the last connect. Went to bed and tried it again in the morning. PERFECT! It’s been working flawlessly for two weeks. Sure is a safe way to check blood sugar while driving. Hope the developer of this app enjoys his coffee!Three week update: Was in the hospital last for knee replacement and the hospital staff was curious why I would be looking at my Apple Watch after they did their glucose finger pricks for glucose levels. They were amazed with the accuracy of the FLwatch readings.
Developer Response
Glad the app is useful. And thanks for the coffee! 😀
Very Useful
Chuck in Massachusetts
Had a small problem with the app. Used the support link in the app itself to send a message about the problem. Philip responded within hours. I worked out the problem quickly with his advice. I sent him screenshots of the problem and he has already fixed it and it will be included in the next release of the app. You just can’t get better product support than that!
Works but fails to update
Cu-Au
The app works as advertised, only problem is that the lock screen graph and number do not update. When you press the update button, it opens the app. This is not why I wanted this. I want an app the can be made to show the current blood glucose number as measured by my CHM to show on the lock screen. Three stars as the app is halfway there….Wow, got a nasty message from the developer. Diabetics are looking solutions. I understand that being limited by iOS is frustrating but not nearly as frustrating as monitoring your vital signs every 15 minutes and taking six shots of insulin a day. Maybe the rating should one star based on customer service.
Developer Response
Thanks for taking the time to leave feedback and for trying FLwatch.FLwatch is a free and open-source project that I develop in my spare time to help the diabetes community. I genuinely appreciate bug reports, feature suggestions, and constructive criticism, because they help improve the app for everyone.That said, some limitations are outside of the app’s control — especially regarding iOS/watchOS background updates, widget refresh frequency, and battery usage, which are heavily restricted by Apple’s system policies and can vary significantly between devices and configurations.I always try to improve performance, reliability, and battery efficiency whenever possible. If something is not working as expected, please consider reaching out through the project channels with details about your setup so issues can be investigated properly.Thank you again for your support, patience, and understanding.
Great App! Highly recommended!
alfreshco
Great to see readings on widgets, also with a reload and time from last reading feature. I’ve been using with iPhone, iPad and Mac. I’m now thinking about getting an Apple Watch to have a faster way to see my readings. I see you added an option to sync to apple health, but the switch to export on the app won’t slide. In settings Apple Health FlWatch is switched on to allow as a source, but still on the app I press y slide on to export the data is not possible. Is it just me?
Developer Response
Thank you for coming back with another review — and I’m glad to hear you’re still enjoying FLwatch!Apple Health support was added after requests like yours, so it’s especially nice to see you using it now.Regarding the export switch: until now, FLwatch required permission for both glucose and insulin data before Apple Health export could be enabled. I recently changed this so the two are handled independently — for example, allowing glucose alone is now sufficient if that’s all you want to export.That improvement will be included in the next release, so what you’re seeing should be resolved there.Thanks again for the feedback and for sticking with FLwatch!
* Try the new workout mode in FLwatch on Apple Watch. See your glucose, trend, recent change and graph alongside workout information, with configurable alerts for low glucose, rapid drops and missing readings.
* If you use Libre 3 or Libre 3+ with direct Bluetooth, Apple Watch can connect directly to the sensor during a workout—so you can exercise without your iPhone nearby. For the most reliable connection, wear your watch on the arm closest to the sensor, ideally the same arm.
* This version adds a watch notification that warns about sensor reconnect limits.
Version 3.1.1
The developer, Philipp Poeml, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Philipp Poeml
Size
34.3 MB
Category
Medical
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
