For the Libre 2 I use the dedicated hardware reader to initialize the sensor. This lets me avoid using the Abbott app altogether. The app for Libre 3 is called

For the Libre 2 I use the dedicated hardware reader to initialize the sensor. This lets me avoid using the Abbott app altogether. The app for Libre 3 is called Juggluco. But really I haven't tested it, so this is just from reading about it.