skills in the four basic calculating operations. For each game, the player can
choose between the four basic arithmetic operations and four difficulties
(exercises up to 10, 100, 1000 and 10000).
After finishing an exercise round the player receives a score which depends on
the number of exercises answered correctly and the time it took to answer all
After every game there is an overview which shows whether the exercises were
solved correctly. It is also possible to choose "Direct Feedback" in the
settings. If direct feedback is chosen, the player will receive feedback whether
the exercise was solved correctly after each single exercise. This App requires
minimal permissions and is part of the Privacy Friendly Apps group developed by
the research group SECUSO at Technische Universität Darmstadt.
Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.Download F-Droid