メントレ is an iOS app that allows users to engage in mental training on their iPhone. This app offers four main features to help users improve their mental game.

The first feature is self-analysis, which allows users to analyze their own characteristics as an athlete. Multiple psychological scales are provided for this purpose, and users can also analyze their psychological state during performance.

The second feature is goal setting. Users can set daily goals, short-term goals, medium-term goals, and long-term goals. They can set both action goals and outcome goals, and the app allows for countdowns and evaluations for each goal.

The third feature is condition checking. By inputting data in the morning and evening, users can check their physical and mental condition on a daily basis.

The final feature is mental training itself. This is used when learning new techniques, improving gameplay, rehearsing plays, improving psychological aspects, and implementing strategies. By training the mental aspect in addition to physical fitness and skills, users can achieve their best performance in sports.