Sudoku Coach - Play and Learn

Learn sudoku the right way. Sudoku Coach doesn't just tell you the answer, it teaches you WHY.

When you get stuck, tap Hint and the coach explains the exact technique needed to make progress. From basic singles to advanced strategies like X-Wing, Swordfish and 3D Medusa, every hint is a mini-lesson that makes you a better player.

FEATURES
- Dark mode for comfortable play
- Custom puzzle input, enter puzzles from books or newspapers
- Auto-notes and smart candidate management
- Cell colouring for tracking chains by hand
- Undo, error checking, and cell solving assistance
- No ads. No tracking. No account required.
- Works completely offline

SMART COACHING HINTS
- 29 solving techniques with clear, friendly explanations
- Hints adapt to your level, simple for beginners, detailed for advanced players
- Visual highlighting shows exactly which cells and candidates are involved
- Colour-coded patterns make chains and fish easy to follow
- Learn techniques like Naked Pairs, X-Wing, Skyscraper, XY-Wing, Empty Rectangle and more
- Prefer a nudge to a lesson? Solve a single cell instead

PRACTICE MODE
- Drill any of the 29 techniques on its own
- Every practice puzzle is built so the technique you picked is the one you need
- Techniques grouped by tier, so you always know what to learn next

TECHNIQUE LIBRARY
- A worked example for every one of the 29 techniques, with the pattern highlighted
- Open it from practice, or straight from a hint in the middle of a game
- Read up before you play, or look something up the moment it appears

8 DIFFICULTY LEVELS
- Beginner, Novice, Intermediate, Skilled, Advanced, Expert, Master and Grandmaster
- Each level introduces new techniques gradually
- No sudden difficulty jumps, progress at your own pace
- Puzzles are generated on your device, so you never run out

TRACK YOUR PROGRESS
- Skill profile shows which techniques you've mastered
- Per-technique coaching tells you where to improve
- 73 achievements across 6 categories to unlock
- Detailed stats: best times, solve counts, streaks, and more

PLAY IN YOUR LANGUAGE
- 12 languages: English, Norsk, Deutsch, Francais, Espanol, Portugues, Italiano, Nederlands, Polski, Svenska, Dansk and Japanese
- Every hint and explainer translated using each language's own established sudoku terms
- Switch in Settings, or use Android's per-app language setting

Whether you're solving your first puzzle or chasing a Grandmaster time, Sudoku Coach helps you understand the logic behind every move.

Recent changes:
Now playable in 12 languages!

• English, Norsk, Deutsch, Français, Español, Italiano, Português, Nederlands, Polski, Svenska, Dansk and 日本語
• Everything is translated — every hint, every technique explainer, all 73 achievements — using each language's own established sudoku terms
• Pick your language in Settings, or in Android's per-app language setting
• Fixed: the Empty Rectangle explainer had the pattern backwards
• Fixed: mastery achievements now state their unlock condition correctly