The Math Rat app for iPhone and iPad

The Mathrat is an education game developed by Boa|Neo.

In six different levels, the child learns the numbers zero to nine,
adding and subtraction as well as the meaning of greater than and less than.

All excercises are awarded with "candy", colorful effects and medals, but look
out for the rat as he will steal the candy unless you tap him quickly.

You can adjust the music, disable the rat and see general game
statistics in the general settings app.

More information at http://www.boaneo.com

Reviews
http://www.pappasappar.se/raknerattan/
http://ipadpanelen.se/?p=315
http://mors-apps.com/2012/03/04/regnerotten/