Pure Sudoku.

Pure sudoku is a clean, distraction-free puzzle game for iPhone and iPad — no ads, no subscriptions, no internet required. GAMEPLAY Fill the 9×9 grid so every row, column, and 3×3 box contains the digits 1–9. Simple rules, endless challenge. FEATURES • Four difficulty levels — Easy, Medium, Hard, Expert • Notes mode — pencil in candidates as you think • Hints — get unstuck without spoiling the whole puzzle • Colour coding — instantly see conflicts and progress • Statistics — track your solve times and streaks • Timer with optional hide mode SETTINGS • Strict mode — highlights mistakes immediately • Sound effects on/off • Full game guide built in • Enhanced visibility mode COMPLETELY PRIVATE No account needed. No data collected. No network requests made. Everything stays on your device.