Practice mental arithmetic with this educational app. Review your calculation process, and easily re-challenge mistaken problems from your past logs. Upgrade to save more calculation history.
Flash mental calculation by kenji kiuchi



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Practice mental arithmetic with this educational app. Review your calculation process, and easily re-challenge mistaken problems from your past logs. Upgrade to save more calculation history.











Engage in quick mental math challenges with 10 questions per round. Build combos, unlock bonus rounds, and track your progress. Customize your experience with adjustable music and haptic feedback.