Top 100 free app for over a year. Rated "Best Sudoku Game of the Year" by Apple. Rated #9 Game of the Year by Apple. Rated #24 App of the Year by Apple with over 10,000 apps competing! With unique handcrafted puzzles across four different skill levels, Sudoku (Free) is a great introduction to the fun and puzzle solving challenge of Sudoku. OPTIONS All options are on by default, but you can turn them off in the Options menu • Show Incorrect :: Shows incorrect answers in red. • Smart Buttons :: Disables the number button when that number is completed on the game board. • Smart Notes :: Removes the number from the notes in the box, column, and row that contains the cell with your correct answer. FEATURES • Multiple color schemes • Unique handcrafted puzzles • Four different skill levels • Challenge a friend • ALL puzzles are solvable WITHOUT guessing • 4 color schemes • "ALL notes": tap the "All notes" button on to show all the possible answers for each square. Tap the "All notes" button off to remove the notes. • Hints: shows the answer for the selected square or a random square when one is not selected • Pause the game at any time and resume where you left off • Best times, progress statistics, and much more Do you want more? Try one of our other versions of sudoku which have all the same great features! * Look for our paid edition of Sudoku with 800 puzzles and more unique color schemes. * Or try Color Sudoku for a fun twist to solving sudoku puzzles. * For advanced puzzle solving, try Expert Sudoku to challenge your sudoku solving skills.