AddOrSub is a free Android game that offers an engaging and challenging way to practice basic arithmetic skills. Players are required to adjust a current value to match a target value by clicking on plus or minus buttons within a strict time limit. This fast-paced gameplay encourages quick thinking and sharpens mental math abilities, making it suitable for players of all ages.

The objective is simple yet addictive: successfully reach the target value before time runs out to win the round. The game's design emphasizes speed and accuracy, providing a fun way to improve calculation skills while competing against the clock. With its straightforward mechanics and focus on arithmetic, AddOrSub serves as both an entertaining game and a useful educational tool.