Important iOS 17 Release Information:

Apple® will introduce StandBy Mode and Assistive Access Mode in the upcoming iOS 17 release. These new modes may impact your experience with your FreeStyle LibreLink app.

FreeStyle Libre 2 sensors are now available to buy online. Real-time glucose readings sent right to your smartphone.

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Optional Glucose Alarms

with the FreeStyle Libre 2 system

Optional glucose alarms available for the FreeStyle Libre 2 sensor and the FreeStyle LibreLink app let you know the minute your glucose is too low or too high.¤

5x faster alarms4

5x more readings power 5x faster alarms4 that let you know the minute your glucose is too high or too low.¤

Easy to set up and use5

Optional glucose alarms are easy to turn on and off and easy-to-adjust sound and vibration.5

Accuracy at every level

You can rely on proven alarm accuracy at every glucose level.5

How it works

When you set glucose alarms, as long as your device is in range, you'll receive a notification when your glucose reading goes above or below your target range.¤

It even works when you're sleeping or when your smartphone is in Do Not Disturb mode. When you receive a glucose alarm, you can tap the notification to immediately check your glucose level and take necessary action. iPhone users who use Focus Modes will need to make sure Time Sensitive Notifications are turned ON for each focus mode.

A boy sleeping in his bed with his sensor visible on his arm.


How to set alarms on the FreeStyle LibreLink app

To receive alarms on your compatible smartphone, you must start your new FreeStyle Libre 2 sensor with the FreeStyle LibreLink app.Ω



How to set glucose alarms on the LibreLinkUp app§

With the LibreLinkUp app, family members and friends can receive your real-time glucose readings and customise glucose alarms.^ For more information about connecting and sharing glucose information with caregivers, go to the LibreLinkUp page. To set up alarms on LibreLinkUp, follow the instructions below.


How to activate alarm notifications on a smartphone

To receive optional glucose alarms on your smartphone, you need to make sure you have notifications enabled for the app. If you didn't enable all notifications and permissions during app set up, how you do it now depends on your phone's operating system.


Enable notifications on iPhone

  •  Open Settings on your iPhone.

  •  Go to notifications and select the FreeStyle LibreLink app

  • Enable Allow notifications

  • Tap to highlight the lock screennotification sounds, and banner options to enable all notifications.

Animated FreeStyle Libre App captured on a smartphone with the FreeStyle Libre sensor next to it.


Enable notifications and location permissions on Android

  •  Open Settings on your Android smartphone.

  •  Go to Apps, select the FreeStyle LibreLink app and select notifications

  •  Tap Notifications and enable All LibreLink notifications.

  •  Tap Permissions and enable Nearby Devices by selecting Allow.

  •  If you selected Deny for Stop optimising battery usage during app setup, toggle Battery to allow.

Animated FreeStyle Libre App captured on a smartphone with the FreeStyle Libre sensor next to it.

How to make sure you don't miss your alarms

There are some things you can do to make sure you don't miss any glucose alarms:


Keep the smartphone's Bluetooth on

Make sure your phone is within 6 meters of you at all times, unobstructed

Do not force close the FreeStyle LibreLink app - let it run in the background

Turn Do Not Disturb off or choose to override Do Not Disturb in your alarm settingsǁ

What to do if you receive a signal loss alarm

To continue receiving low or high glucose alarms, check the following steps:

  • Ensure that your smartphone is within 20 feet of you at all times, unobstructed.

  • Do not force close the app – keep it running in the background.

  • Turn off Do Not Disturb mode or select Override Do Not Disturbǁ in your alarm settings.

  • You must accept the app’s permission request for Critical Alerts to turn off Do Not Disturb mode. Or enable the Critical Alerts setting directly from the app’s notification settings.

  • Keep your Bluetooth switched on.

    If you are still receiving the Signal Loss Alarm, visit our Troubleshooting page.

A screenshot of a LibreLink app signal loss notificatio on a smartphone

References & Disclaimers

Images are for illustrative purposes only. Not real patient or data.

◊ The FreeStyle LibreLink app is only compatible with certain mobile devices and operating systems. Please check the website for more information about device compatibility before using the app. Use of FreeStyle LibreLink may require registration with LibreView.

¤ Notifications will only be received when alarms are turned on and the sensor is within 20ft of the reading device.

Ω Patients choose which device they want to receive alarms: FreeStyle Libre 2 reader or FreeStyle LibreLink app. They must start their FreeStyle Libre 2 sensor with that selected device. Once the patient scans their FreeStyle Libre 2 sensor with that device, they can receive alarms only on that device. 

§ The LibreLinkUp app is only compatible with certain mobile devices and operating systems. Please check for more information about device compatibility before using the app. Use of LibreLinkUp requires registration with LibreView. The LibreLinkUp mobile app is not intended to be a primary glucose monitor: home users must consult their primary device(s) and consult a healthcare professional before making any medical interpretation and therapy adjustments from the information provided by the app. 

^ Glucose alarms will transfer to the LibreLinkUp app when users are connected and alarms are enabled on the FreeStyle LibreLink app.

ǁ Do not disturb mode will prevent you from receiving alarms unless you allow critical alerts. You must accept the app’s permission to request for critical alerts during app setup. To override  Do not disturb (DND) in your alarm settings , you first need to turn on a glucose alarm to access the DND setting.

1. Please see the FreeStyle Libre LibreLink User Manual for complete instructions.

2. 3.9 mmol/L is the default Low Glucose Alarm level and can be set between 3.3-5.6 mmol/L.

3. 13.3 mmol/L is the default High Glucose Alarm level and can be set between 6.7-22.2 mmol/L.

4. Dexcom G6 CGM User Guide and Medtronic Guardian Connect System User Guide.

5. Data on file, Abbott Diabetes Care, Inc.