Sudoku All in One

Over 10,000 Sudoku puzzles with smart input, one‑click solving, and illustrated tutorials from beginner to expert level. Easily exercise your brain and boost logical and mathematical thinking. Challenge yourself anytime, anywhere.

6 difficulty levels: Kids, Easy, Standard, Hard, Expert, Extreme, covering all needs from newcomers to masters.
‑ Massive puzzle bank: 10000+ classic Sudoku levels with ongoing updates for endless non‑repeating puzzle‑solving fun.
‑ Illustrated tutorials: Covers core techniques including Naked Singles, Hidden Singles, Pairs, Chains and more. Learn while you play. We highly recommend mastering chain‑based reasoning with “Extreme Level 1”, the ultimate tool for cracking any Sudoku puzzle.
‑ Ad‑free clean experience: Fully clean interface with no pop‑ups or distractions for focused thinking.
‑ One‑click solve: Automatically compute answers quickly to break through stuck points.
‑ Smart hints: Toggle on or off freely, balancing guidance for beginners and clean play for experts.
‑ Smart input: Automatically filters invalid numbers for accurate, efficient entries every time.
‑ Smart notes: Jot down candidate digits in any cell to support deep reasoning.
‑ Dual markers: Confirmation markers and question markers make your reasoning process crystal‑clear.
‑ Color markers: Built for advanced players to handle complex solving techniques such as AIC and ALS with ease.
‑ One‑click operations: One‑click restart, one‑click clear, and one‑click global reset while keeping notes for smoother controls.
‑ Powerful undo: Quickly revert wrong moves, feel free to test and revise.
‑ Smart reminders: Double‑confirmation before erasing notes to prevent accidental loss of important marks.
‑ Auto‑save: Progress auto‑saves when exiting or switching levels, resume seamlessly on re‑entry.
‑ Smart adjustment: Detects playing and idle states for convenient controls and better power efficiency.
‑ Eye‑care mode: App‑level eye‑protection toggle enabled by default to protect your eyes.
‑ Share function: One‑click sharing for seeking help on tough puzzles or celebrating solving achievements.
‑ Cross‑platform support: Fully optimized for mobile and desktop, enjoy Sudoku wherever you go.
‑ Permissions note: The basic version gives access to all core features for easy getting‑started. Pro unlocks the full puzzle bank and one‑click solve for advanced players.

Sudoku rules: Fill empty cells with digits 1‑9 such that every row, every column and each 3×3 box contains no repeated digits to complete the puzzle.

Recent changes:
The option buttons in the dialog box are now focused by default to facilitate operations on desktop versions or mobile versions with connected keyboards. Additionally, a supplementary Sudoku calculator button has been added to the level completion tab. for en-US here