I played few games with the app, and also the different ages don't seem to match. Obviously I'm not at IM level, and Carlsen I believe at 10 was already at least around 2000-2200.
This is the game played with Carlsen age 10, and I won easily. But if this was chessmaster with a 2200 rated character, I doubt I would win.
Another thing which takes away from the experience, and one knows he is playing with a computer is the fact that everytime I need to give checkmate, quite silly.
at ages 11 and up he will eventually resign (except for one occasion against age 12, where he didn't resign and I checkmated him).
It's a great app, are you kidding? Optime Software's Chess app is horrible, in comparison. What does it matter that there's no time control and only one board set? The app is still relatively new, and they're still working on it! At least it's currently playable. My favorite chess app by far.