Edit 06/03/22 I originally gave OA three stars after using for a few days. Having now used the app for a month, I'm afraid I'm joining the one star club. It is unfailingly unreliable. It refuses to record an entire track without disconnecting itself (and yes, high accuracy GPS is on and battery optimisation is off). It regularly crashes and locks up resulting in an Android 'this app has stopped working' message....and that's before we mention the veritable plethora of missing features. Not good.