A free program for Android, by Apollo Game Studio.

The Classic Sudoku Puzzle app is a free logic puzzle game for Android that lets you enjoy a challenging and rewarding gameplay experience in a beautiful and intuitive user interface. With a wide variety of difficulty levels, you can play a quick game or have hours of fun.

This brain game will help you improve your memory, focus, attention, and logic. The game is based on a grid with numbers 1 through 9. You need to place numbers into the grid to solve the puzzle.

Each puzzle has only one solution, and it is not easy to find it!

You can play Classic Sudoku for free. However, if you want to get the most out of the game, you can purchase the Classic Sudoku Pro app or the Classic Sudoku Master app.