A free program for Android, by Mobi4Hobby.

Sudoku is a logic puzzle that is popular around the world. It is a classic game that is easy to learn and challenging to play. It is played by people from all countries.

In Sudoku, you have to place numbers from 1 to 9 in each of the empty cells of a 9×9 grid that consists of 3×3 subgrades called regions. The goal of the game is to place numbers in the empty cells in such a way that no number is repeated in the same row, column, or region.

If you ever get stuck, you can ask for help in the game. You can also check the solutions for all the puzzles.