Brain training calculation app that can beat the zombies in mental arithmetic has emerged. The words that come out to the left and right let's calculate alternately. Addition, subtraction, supports the multiplication. Android, tablet, iPhone, iPad compatible. Collect coins, let's move to a more intense stage. In a more strong stage, it will be more difficult problem is displayed. A game, with repeated practice, you can speed up the calculation. Speed ​​results at the time of clear, is recorded