Fair
Prompted to rate too soon, Ive not played much. Just 5 or 6 games.
Havent seen if you can control the time for a game. Probably cant, but it seems too short. However, Im an adult, it might be ok for early learners (read kids).
Easy levels seem to work well, good review for early learners or anyone working on basic math skills, immediate feedback for wrong answers.
Global Score and Achievements functions dont work. Dont know if its because of iOS 8.1.2 or what.
Green Shirt about
Number Tap, v1.4