I returned today from a trip to London. An hour or so into the flight Poweramp again stopped working with the usual message about being unable to verify the license without an internet connection. So for the remaining nine hours of the flight to Los Angeles I couldn't use this app. I don't think that I have ever completed a transatlantic or transpacific flight and not have PA stop working once disconnected from the internet. Other users must be using PA on airplanes, so why does it always happen to this installation?
For the record, the hardware is a Zenfone 2 running Android 5.0. The