Dr Porter's Memory and Number Trainer

Instant failure memory and mental arithmetic game

How to play

Touch a square. Solve the mental arithmetic question and slide to the next square. If you lift your finger or pick the wrong square you lose.

Scoring

Depends on the difficulty setting and grid size (you get more points for bigger grid sizes and higher difficulty). Try to beat your high score.

Get it now

From the App Store, for iPhone and iPad:

Dr?

Yes, I have a PhD. Though not in anything related to medicine.