Yes, the FreeStyle Libre 3 app* will work in 'airplane mode' to view glucose readings and receive alarms† as long as Critical Alerts / Do Not Disturb permissions are enabled and Bluetooth is turned ON.
* The FreeStyle Libre 3 app is only compatible with certain mobile devices and operating systems. Please check our compatibility guide for more information about device compatibility before using the app.
† Notifications will only be received when Critical Alerts / Do Not Disturb permissions are enabled, Bluetooth is turned ON, and the sensor is within 33 feet unobstructed of the reading device. You must enable the appropriate settings on your smartphone to receive alarms and alerts, see the FreeStyle Libre 3 User's Manual for more information.