Overview
Rechenflow
Short, clear rounds of mental math: a daily challenge with ten problems, focused training by operation, a 60-second sprint, estimation with rounding and orders of magnitude, plus Pro and Relaxed rounds. The daily challenge, addition training, stats and history are free. Rechenflow Complete unlocks every operation (+ − × ÷ % and x²), Sprint, Estimate, Pro and Relaxed with one purchase, plus the daily pro challenge, one streak joker each month and cloud backup with sign-in; see the current price in the app. After every answer you see right away what is correct, with its own sounds and haptics, both optional. Local rounds work offline. Scored online rounds are supplied and verified by the server; purchase and restore also need internet. Signing in for cloud backup is optional.
