Let’s get connected.
The essentials for bringing your Libre readings into Apple Health, and keeping them close throughout your day.
Glucose Connect is coming soon. This guide describes the current app. Setup details may change before release.
Before you start
- An iPhone running iOS 18 or later and a Libre 3 sensor.
- The official Libre 3 app installed, connected to your sensor, and running on the same iPhone. It uploads the readings Glucose Connect uses.
- A LibreLinkUp follower account receiving your readings. This is a separate login from your Libre 3 or LibreView account.
- Internet access and Bluetooth enabled. Apple Watch is optional; the companion app requires watchOS 11 or later.
Three steps to connect
- Set up sharing in the official Libre app. Invite your LibreLinkUp follower account and accept the invitation in LibreLinkUp. Confirm that your readings appear there before continuing. Keep the official Libre app running.
- Open Glucose Connect and connect LibreLinkUp. Read and acknowledge the app’s disclaimer, then sign in with the follower account. The app checks your credentials. Follow the sensor-connection prompts and allow Bluetooth access.
- Allow Apple Health access. Grant permission to write Blood Glucose readings. You can revisit the connection and Health permissions in Settings if you skip these steps initially.
Glucose Connect uses Bluetooth activity from the sensor to prompt a fetch from LibreLinkUp. The glucose values themselves come from LibreLinkUp, so internet access and the official Libre app are still needed.
Get to know your average day
On the main glucose screen, choose the ~ tab to see your average day. It brings readings from the same time of day together across your selected window, creating one 24-hour graph. The shaded bands show how your readings are distributed, so you can see both typical patterns and variation.
Choose 7, 14, or 30 days for Average day in Settings. The default is 14 days. You’ll need at least a couple of days of readings for the view to become useful. This is a view of past readings, not a forecast.
Put a widget on your iPhone
Home Screen
Open Glucose Connect once, then touch and hold the Home Screen. Choose Edit → Add Widget and search for Glucose. Pick a size and add it. Small widgets show a reading, trend, and age; larger widgets add a glucose graph.
Lock Screen
Touch and hold your Lock Screen, choose Customize, and select the widget area above or below the clock. Add a Glucose widget in the layout you prefer.
Widgets show the age of their data. iOS decides when to refresh them; they may lag behind the app. A Lock Screen widget makes glucose information visible while your phone is locked. Remove it if you prefer to keep that information private.
Bring it to Apple Watch
The Watch companion is included with the iPhone app. In the iPhone’s Watch app, find Glucose Connect and install it or enable Show App on Apple Watch. Open it once on your Watch to start receiving snapshots from your iPhone.
To add a complication, touch and hold your watch face, choose Edit → Complications, select a slot, and choose Glucose Connect. Available layouts depend on the watch face. The Watch displays readings received from your phone; it does not connect directly to LibreLinkUp.
When something looks out of date
Readings are missing or have stopped updating
Check that readings are current in the official Libre app and then in LibreLinkUp. Keep the official Libre app running, confirm Bluetooth and internet access, and reopen Glucose Connect. Pull down on its main screen to request a refresh. Check the connection status and Diagnostics for more information. Updates depend on Abbott’s services and iOS background scheduling.
My login isn’t working
Use the LibreLinkUp follower login, not the Libre 3 or LibreView login paired with your sensor. Confirm that you can sign in to LibreLinkUp and see the shared readings. Then retry from Glucose Connect Settings.
I don’t see readings in Apple Health
In Apple Health, tap your profile picture and open Apps and Services → Glucose Connect. Check permission to write Blood Glucose. Return to Glucose Connect and check that readings are arriving. Health permissions can be changed at any time.
My widget or Watch is behind the app
Open Glucose Connect on your iPhone to check its latest reading and connection status. Open the Watch app too if needed, and confirm your Watch can communicate with your phone. iOS and watchOS control widget and complication updates, so opening the app does not guarantee an immediate refresh everywhere.
Older history isn’t showing up
Recent readings are kept locally for 30 days. Older readings can be imported from Apple Health for Rewind. Enable Blood Glucose read access in Apple Health, then use Glucose Connect’s History settings to import. Removing imported history removes only that local archive; it leaves Apple Health and recent readings intact.
Know the limits
Glucose Connect is an independent hobby project. It is not a medical device, has no alarms, and must not be used for treatment decisions. Readings can be delayed, incorrect, or missing. Keep using your established monitoring and alarm tools.
For details about how information is handled, read Privacy.