Thanks guys for your replies I really dont fly my Solo as often as I should and subsequently always stayed with the original app which has served me for what I need as a hobbyist. I just bought a new phone with Android 9 on it and although the App installs just fine it reports the Application has Stopped when I run it. Damn shame really as obviously Google does not worry at all about backwards compatibility for software which must leave millions of people in the same boat as me for different things I suspect.