I need to write down some for of spec describing what android version my app is compatible with.
I've been developing since V4.1.x and all seems fine up to and including 6.0.1, but is there a way I can find out decisively what the minimum version of android my app will run on?
Thought perhaps the play store may give this information after examining the APK but can't see it anywhere.
I think it is better the other way around...
Instead of trying to find which version your app is compatible with, define it yourself according to the most advanced feature you use...
search the android docs about the properties and methods you use and check the highest SDK as the one your app is compatible with, and up!