I've had problems with it (as in "not working" problems) on a low-end Android 2.3 phone.
I suspect it does better with more memory and a more recent version of Android; I have a new phone but haven't tested it beyond one game, where it worked correctly.
But a game where a king gets promoted or pieces start moving randomly ... yes, it could have been my phone. I mentioned I have a new one? :-)
This is the greatest app so far.It supports chessbase tree.It supports every uci Android engine.