Sudoku Calm - Learn & Play

Sudoku Calm is a quiet, clean sudoku game. No ads, no pop-ups, no data collection — just you and a good puzzle. HINTS THAT TEACH When you're stuck, tap Hint and it explains the next step like a tutor would: naked and hidden singles, pointing and claiming, pairs and triples, all the way up to X-Wing, Skyscraper, Two-String Kite, XY-Wing, XYZ-Wing and Swordfish. The relevant cells light up on the board, step by step. 42,500 CAREFULLY GRADED PUZZLES Every puzzle has a unique solution and a symmetric layout, and is graded by the hardest technique it actually requires: • Easy — basic scanning only • Medium — hidden singles and pointing • Hard — pairs and triples required • Expert — X-Wing, XY-Wing and other advanced techniques required FRIENDLY FOR BEGINNERS Your first Easy game starts with an interactive 8-step tutorial covering the rules and the most useful techniques. THOUGHTFUL DETAILS • Notes and one-tap Auto Notes • Notes clear automatically when you place a number • Unlimited undo and erase • Highlights for matching numbers and the current row, column and box • Daily Challenge • Statistics — win rate, best times, streaks — synced across your devices with iCloud • iPhone and iPad, with landscape on iPad • Dark Mode and multiple accent colors Completely free. No ads, no in-app purchases, no personal data collected.