The application consists of two game modes: 30 seconds or 15 operations. The game allows for each mode a suitable difficulty depending on the user's abilities:
easy: Additions and subtractions with numbers from 1 to 9.
medium: Additions and subtractions with numbers from 1 to 99.
hard: Additions and subtractions with numbers from 1 to 500.
9Apps 4.9
