I received an email from Rein Halbersma who suggested an improvement for Checkers for Android by accepting a move as soon as any ambiguity has been resolved. In many cases this enables single click input. I have implemented this request, together with extending the "move coach" to show all valid moves, as illustrated below.
Hopefully this new option is useful for people that are learning checkers. Both improvements are available in v2.3 of Checkers for Android.