This app is a quiz app as same as Youkai Test, but it sets the problems in random order. Total number of the problems are more than 300. The problems are in Japanese at this point, but planning to make it in English. In the time attack mode, there are 4 levels, starting with level1 and 2. When you clear the stage, a new stage appears. Level 1 might be easy for Youkai Watch fans, but Level 4 may be difficult even for big Youkai Watch fans. You can choose 5 levels, or from all levels. Each level, there is 10 problems course and 20 problems course. There are also mini games, Brain Train, and learn numbers and calculation quiz. Brain Train is an escape game. You can escape the room solving the puzzles. Calculations quiz are addition, subtraction, multiplication, and division. There is also time attack mode for multiplication, division, addition, and subtraction. You can make your calculation speed higher enjoying the game. You can use the game center, to compete with friends, with both Youkai quiz and mini games.