Download Sudoku FREE for Android Phones and Tablets. Improve your skills with these classic brain puzzles. You can start your journey on easy and increase the difficulty level when you are ready. This is great for beginners and advanced number Ninjas. Your results are saved under each difficulty setting so you can see how many games you completed from the total played. Each Sudoku game is timed, so you can continue to improve your speed over time, or simply play casually when and how you like.