Brain exercises old version is a free puzzle game for Android developed by BrainExer. The game is designed to improve cognitive abilities and memory through a series of exercises. The game consists of four categories; Math, Concentration, Memory, and Thinking, with each category having several exercises to complete.

The Math category includes exercises such as calculation, math operations, and inequality. The Concentration category comprises missing number, the sequence of numbers, count symbols, and switch. The Memory category consists of word list, word groups, and N-back. Finally, the Thinking category includes exercises such as find the path, count the quantity, comparison, and Stroop effect.

Overall, Brain exercises old version is an enjoyable and challenging game that tests the user's cognitive abilities. The game is easy to navigate, and the exercises are well-designed. The only downside is that the game is an older version, and it may not be as updated as the newer versions. However, it is still worth a try for those who want to improve their mental abilities.