Ninimaths is described as 'Train mental arithmetic with five modes: addition, subtraction, multiplication, division, and mixed. Combine 1 to 5 digit numbers freely, practice in column format, track daily scores per mode on a graph, compete on Game Center, and push your speed in time trials' and is a Math Game in the education & reference category. There are five alternatives to Ninimaths for a variety of platforms, including Android, iPhone, iPad, Web-based and Mac apps. The best Ninimaths alternative is Freaking Math, which is free. Other great apps like Ninimaths are 10 seconds of math, Math Master - Brain Quizzes, MathBrain and Times Tables Rock Stars.