Sudoku - Classic Puzzle - OS

Sudoku OS — Master Your Mind Whether you're picking up Sudoku for the first time or you're a seasoned solver, Sudoku OS delivers a clean, distraction-free experience built for every level of player. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🧩 FIVE DIFFICULTY LEVELS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • New User — Learn the rules at your own pace • Easy — Warm up your mind • Medium — Test your pattern recognition • Hard — A real challenge awaits • Expert — Only for true masters ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚡ FEATURES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Smart hint system — use hints to get unstuck without giving everything away • Notes mode — pencil in candidates just like on paper • Undo — take back any move instantly • Mistake highlighting — catch errors before they cost you the game • Matching number highlight — tap a cell to see all matching numbers on the board • Auto-remove candidates — keep your notes clean automatically • Hearts system — you get 3 chances; watch a rewarded ad to restore a heart ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎨 PERSONALISATION ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • 4 themes: Dark, Light, Midnight, Sand • 5 accent colours to match your style • 3 board number sizes: Small, Medium, Large • Sound effects and haptic feedback toggle ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📊 STATS & ACHIEVEMENTS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Track wins across every difficulty • View your best times • Unlock achievements as you improve ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔒 PRIVACY FIRST ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Your game progress and settings are stored locally on your device — they never leave it. No account required. No sign-up. Just Sudoku. SudokuOS is free to play and supported by ads. Rewarded ads are always optional. Download Sudoku OS and start sharpening your mind today.