The default setting for the High Glucose Alarm* is set to 250 mg/dL but can be changed to a threshold between 120 mg/dL and 400 mg/dL on the Libre app†.
*Alarm notifications will only be received when alarms settings are enabled and turned on and sensor is within 20 feet (FreeStyle Libre 2) or 33 feet (FreeStyle Libre 3) unobstructed of the reading device.
†The FreeStyle Libre systems apps are only compatible with certain mobile devices and operating systems. Please check the Support section of our website for more information about device compatibility before using the apps. Use of the FreeStyle Libre systems apps may require registration with LibreView.