It is required to keep the LibreLink◊ app running in the background when using the alarms^{^} functionality and to receive real-time glucose readings.

◊ The FreeStyle LibreLink app is only compatible with certain mobile devices and operating systems. Please check our website for more information about device compatibility before using the app. Use of the FreeStyle LibreLink app may require registration with LibreView.
^ Notifications will only be received when alarms are turned on and the sensor is within 20 feet unobstructed of the reading device. You must enable the appropriate settings on your smartphone to receive alarms and alerts, see the FreeStyle LibreLink User’s Manual for more information.