Kraepelin Training is an educational app designed to improve mental calculation skills. The program offers a unique Kraepelin test where users need to add adjacent numbers and provide the last digit as the answer. With a structured format of 15 minutes of training, followed by a 5-minute break, and another 15 minutes of training, users can efficiently enhance their calculation abilities. The app suggests 15 sets of 60-second exercises for practical training.

One of the key features of Kraepelin Training is the custom operator mode, allowing users to practice with different mathematical operators such as addition, subtraction, and multiplication. Additionally, users receive test assessments ranging from ranks S to C, encouraging focused practice to achieve higher ranks.