Mathetiger is an Android game developed by Mildenberger Verlag GmbH that aims to help kids practice mental arithmetic. The game focuses on the four basic arithmetic operations taught in grades 1 to 4 and adapts to the child's math level. The difficulty level of the problems presented by the Math Master automatically adjusts to the child's calculation ability.

The game has two main modes - The Tiger Calculation and The Math Trainer. In the first mode, the child has to solve as many arithmetic problems as possible within a given time frame. In the second mode, the child can practice specific arithmetic operations and improve their math skills.

Mathetiger is an excellent educational game that motivates children to improve their mental arithmetic skills. The game is available in both English and German languages, making it accessible to a broader audience. The leaderboard feature adds an extra layer of motivation that encourages kids to improve their scores and challenge their friends.

Overall, Mathetiger is a great tool for parents and teachers to help children develop their math skills while having fun.