Enjoy the classic number puzzle in a clean, new look, allowing you to focus on what makes solving Sudokus fun. Challenge yourself with puzzles of increasing difficulty and learn new techniques along the way. Qudoku comes with an advanced hint system, offering you visual explanations of over 30 different techniques to solve even the hardest Sudokus. Please note that Qudoku is still in development, you can help improve the app by providing feedback and suggesting new features.

- 7 difficulty classes 🧩
From beginner-level to almost impossible, Qudoku offers Sudoku puzzles for all players. Sudokus of higher difficulties can only be tackled with advanced techniques such as chains, ALSs and coloring strategies.

- Advanced hint-system 💡
Stuck on a puzzle? Qudoku can provide hints using a powerful solver that supports grouped/ALS-chains, uniqueness strategies and much more!

- Intuitive controls 🎮
Number-first or cell-first, multi-select, pencil marks and an adjustable input layout are just the beginning. Set colors to cells or individual pencil marks for advanced solving techniques.

- Customizable visual and gameplay assists 🛠️
Highlight cells with the same value, auto-add pencil marks or auto-remove marks when setting a value to streamline the solving process.

- Color themes 🎨
Choose one of the existing material themes or let Qudoku use the accent colors of your device. Of course there’s also a dark mode!

- 100% Offline 📶
Qudoku works entirely offline, from generating Sudokus to receiving hints. Enjoy solving puzzles anytime, anywhere!

- Compare your results 🏆
Track your progress and challenge yourself to improve your solving times, separated by difficulty.

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