Sudoku Classic

Sudoku Classic is a clean, thoughtful puzzle game designed for focused play at your own pace. Solve a quick daily challenge, settle into a longer grid, or keep improving your personal best. Choose your challenge Play Easy, Medium, Hard, and Expert puzzles. Every included grid has a verified unique solution and is available offline. A fresh daily puzzle gives you a reason to return and build your streak. Useful tools when you need them - Add multiple pencil marks - Fill candidates automatically - Clean notes as you solve - Undo moves without losing momentum - Pause and resume at any time - Use teaching-focused hints - Turn instant mistake checking on or off - Rely on autosave to protect your progress Follow your progress Track completed puzzles, daily streaks, monthly activity, and personal best times. Optional leaderboards let you compare results when you choose to share them. Make it yours Choose a light or dark appearance, adjust haptic feedback, set a daily reminder, and play without creating an account. Classic puzzles remain available offline; internet access is needed for online leaderboards and purchases. Sudoku Classic includes advertising. An optional one-time Premium purchase removes ads and unlocks unlimited hints and second chances.