Nine: Sudoku No Ads

Sudoku with no ads — and every puzzle solvable by logic. No banners, no pop-ups, no videos between puzzles. Not now, not ever. Just the grid. Every puzzle in Nine has exactly one solution and is checked by a solver before you see it, so you never have to guess. Difficulty is graded by the techniques you'll need, not just the number of clues. FOUR LEVELS • Easy — warm up with singles • Medium — fewer clues, still singles • Hard — needs pointing pairs • Expert — pairs, triples and X-Wings BUILT FOR SOLVING • Notes that clear themselves when you place a number • Free, unlimited undo • Highlights for the row, column, box and matching digits • See how many of each number are left • Mistakes shown as you go — or turn them off • Your puzzle is saved automatically CLEAN AND QUIET • No ads, ever — not even in the free version • No account. No tracking. • Dark and light themes • Works fully offline NINE PRO (one-time purchase) • Unlimited hints (3 per puzzle free) • Ocean, Ember and Forest themes