Mobile games are garbage. They, at best, are pay-for flash games, and at worst, are a small fraction of a game designed to push you into paying money to unlock features which are a near unfeasible grind to unlock normally (if it's even possible).

The only way they shine is Draw Something/Words With Friends-style turn-based multiplayer, and even then they still suffer from the issues I noted above.

I have far more fun playing Pokemon on an emulator on my phone than I've had with any mobile game to date.