A free app for Android, by Brain Tonic.
A free Sudoku game with the number puzzle. This is a fun way to train your brain, especially if you're having trouble focusing or you need a quick mental workout.
The game is made up of multiple levels of difficulty, which make it great for both kids and adults. The puzzles are designed to be challenging but not impossible, making it possible to come up with a solution even if you don't know the exact number.
Sudoku Classic has an easy-to-use interface and supports both mobile and tablet. The puzzles are designed to be easy to play but won't let you get away with cheating.
