Clean Sudoku – Offline Solver

Fishtail Apps

About this game

Play Sudoku the way it should be—clean, fast, and deeply satisfying. Clean Sudoku brings classic 9×9 logic to life with a minimalist design, smooth controls, and tools that help both newcomers and experts enjoy every solve.

WHY YOU’LL LOVE IT
• Clean, distraction-free UI built for focus
• Offline play—no connection needed
• Camera Scan & Solver: snap a newspaper puzzle and solve or play it in the app
• Multiple difficulties from Easy to Expert
• Smart Hints that teach (not just tell) the next logical move
• Notes / Pencil Marks with candidate highlights
• Mistake Check & Duplicate Highlight (optional)
• Undo / Redo and Auto-Save so your progress is always safe
• Detailed Stats: time, streaks, bests, and completion rates
• Daily Challenge & Global Leaderboard
• Custom Themes including Soft Mode and Dark Mode
• Haptics, sound, and animation tweaks you can control

FOR BEGINNERS
• Learn-as-you-play hints that explain strategies step-by-step
• Gentle difficulty ramp, error-checking, and optional guides
• Auto-fill notes (optional) to understand candidate logic

FOR EXPERTS
• Handcrafted, unique-solution puzzles and symmetric layouts
• Zero-delay inputs, fast note toggling, and precision controls
• Timer, personal records, and advanced candidate tooling

TOOLS & CUSTOMIZATION
• Toggle mistake check, note styles, and highlight preferences
• Switch themes anytime—Soft Mode, Light, or Dark
• Turn haptics/sounds on or off to match your vibe

FAIR & FOCUSED
• No sign-in required
• Works great offline
• Small download size and battery friendly

TIPS
• Long-press a number to highlight its places on the board
• Use Smart Hints to learn techniques like singles, hidden singles, and more
• Prefer playing scanned puzzles? Use the Camera to import and track them

Whether you solve a quick daily grid or grind for a new personal best, Clean Sudoku keeps the experience pure, elegant, and fast. Download now and make Sudoku your mindful daily habit.

Ratings and reviews

I like it but there could be a few improvements. the notes numbers could be bigger. when you pause and leave a game all your notes are gone when you return. and the undo button only undoes the large numbers and not the notes, it should just undo whatever your last action was. despite these things, it's still way better than having to deal with ads

After completing a game, the timer continues to advance instead of stopping and automatically displaying a new game to start. Does not keep track of the best time to complete the game. What can you expect; the game is free. Okay, otherwise. UPDATE(8/9/2025) Sometimes the game's timer will stop once completed, but not always. Still need to fix this bug, but the game is free and definitely has NO ads.

Like that you can set up your own puzzles. will use this due to this feature since most apps don't have this. Wish the undo button would undo the note numbers you put in, instead of just undoing the solved numbers. Also, when leaving the app and returning without closing, it saves my created game but not the penciled in numbers-- which is a bigger pain,l. I can't leave a puzzle now unless I have enough filled in to not be bothered by redoing the fill ins.

What’s new

What's New
- 🏆 Global Leaderboard - Compete with players worldwide and see where you rank
- 🎨 Soft Mode UI Updates - Refreshed interface for better user experience
- 🐛 Bug Fixes - Resolved various issues for smoother gameplay
- ⚡ Version Updates - Updated to the latest stable version for improved performance