Sudoku Duo: Classic & Diamond

Sudoku Duo brings two views to the classic number puzzle: a familiar square grid and an adjustable Diamond board with a signature 30° view. Solve daily Sudoku, follow the logic and discover your next technique. A BOARD THAT FITS YOU Choose Diamond or classic style and save separate portrait and landscape preferences. In landscape, controls move beside the board to give the puzzle more room. Hold a cell to inspect nearby numbers without changing your answer. SEE WHY THE NEXT MOVE WORKS Hints guide you through observation, reasoning and the conclusion. Follow the highlighted evidence, compare candidates and reveal the answer when you are ready. LEARN TO FIND IT YOURSELF Practice spotting the right cell and digit, instead of following a marked answer. Explore techniques from singles and pairs to advanced patterns. Ask for a clue when you need one, then try a new exercise independently. MAKE YOUR PROGRESS VISIBLE Earn achievements through solving, daily challenges and technique practice. See exactly what each milestone requires and jump straight into the matching activity. FIND YOUR FLOW Double-tap an empty cell to open a nearby number pad. Add candidate notes, highlight related cells, undo a move, or pause whenever you need. Gentle tips on the actual interface introduce the gestures as you play. A LITTLE CHALLENGE, EVERY DAY Take on the daily puzzle or choose from six difficulty levels, Very Easy to Master. Track your progress and achievements, or bring in another puzzle from text or a photo. PLAY AT YOUR PACE Choose from 50 language and region options in Settings, or follow your device language. Switch without losing your current puzzle. Play offline without creating an app account. Progress can sync privately through iCloud. Choose light or dark appearance and use larger text on iPhone and iPad. All puzzles, difficulty levels, hints, lessons and import tools are available in the free version. It may show portrait banners and an interstitial after a completed or ended game. One optional lifetime Premium purchase removes ads. No subscription.