Hippo Math is a new face-controlled brain training game that combines counting and reaction skills. The app uses the TrueDepth camera on iPhone X to recognize and detect the user's facial expressions, allowing players to catch and eat fruits with their mouth. The goal is to feed the hungry hippopotamus with the correct number of fruits without overeating or letting him eat rotten fruits.

The game starts with a path where different fruits roll down towards the hippo. Players must open and close their mouth to catch the fruits when they reach the blue line. If a fruit is not needed, players can blow it off. The difficulty level increases gradually, challenging players to count and eat the right number of fruits while making the necessary facial expressions.

Hints are provided initially, but as players progress, they need to calculate and remember the number of fruits on their own. The game continues until the first mistake. Once all the necessary fruits are eaten, the game is won.

Hippo Math is a fun and educational game suitable for both adults and children. Improve your reaction and counting skills with this unique AR brain trainer.