Taps for iPhone
There are plenty of fun games you can play on your iPhone. Some of them actually give your brain a workout. Take Taps for instance. It is fun little app with puzzles that you can solve by making the numbers in your grid match the target grid. You get 400 levels to try.
Taps is optimized for iPhone and iPad. It comes with 4 different styles of play for you to try and can compare your times against others. You can tap on a tile to increase its value and double tap to reserve action. Like what you see? You can get yours for under $2 at this time.