SUDOKU is the ideal app for those looking to learn and master the art of sudoku. Designed for iPhone users, this free game developed by Sarah Pierce offers a gradual learning experience, starting with tiny puzzles and gradually increasing in difficulty through nine different levels.

One of the standout features of SUDOKU is its in-game help feature, which utilizes pictures to make the rules of sudoku easy to understand. This visual aid ensures that beginners can grasp the fundamentals of the game quickly and easily.

With SUDOKU, users can choose from three different puzzle sizes - 4x4, 6x6, and the classic 9x9. The app also provides a puzzle book view, allowing players to track their progress and see how far they've come on their sudoku journey.

SUDOKU comes with 60 free puzzles for users to learn and practice on. Once these are mastered, additional puzzles are available for purchase, providing endless hours of brain-teasing entertainment. With a total of 4,500 puzzles available, there's always a new challenge waiting to be solved.

Whether you're a beginner or a seasoned sudoku enthusiast, SUDOKU is a must-have app for anyone looking to exercise their brain and have fun while doing it. Download it now and start your sudoku journey today!