About Ninja Sudoku - Hints & Solver
Ninja Sudoku: The ultimate offline Sudoku app! Enjoy classic Sudoku, Killer Sudoku, Jigsaw, and X Sudoku — over 300,000 puzzles from easy to expert. Play ad-free, scan puzzles with your camera, get unlimited smart hints,...
Ninja Sudoku: The ultimate offline Sudoku app!
Enjoy classic Sudoku, Killer Sudoku, Jigsaw, and X Sudoku — over 300,000 puzzles from easy to expert. Play ad-free, scan puzzles with your camera, get unlimited smart hints, and improve your skills with built-in logic strategy explanations.
🧠 Features:
✓ 300,000+ puzzles in 5 difficulty levels
✓ No ads while playing
✓ Scan Sudoku from camera or image
✓ Play Classic, X, Jigsaw & Killer Sudoku
✓ Smart solver with logical step-by-step hints
✓ Clean UI, fast input, auto-candidates
✓ Notes, undo/redo, highlight duplicates
✓ Learn techniques: X-Wing, Y-Wing, Naked Pairs, and more
💡 Brain Boosting Benefits:
Playing Sudoku daily improves memory, reduces stress, and sharpens focus. It’s the perfect mental workout for all ages.
Install Ninja Sudoku now and train your brain the smart way — anytime, anywhere!
Previous Versions
Here you can find the changelog of Ninja Sudoku - Hints & Solver since it was posted on our website on 2020-11-23 09:49:06.
The latest version is 4.0.4 and it was updated on 2026-10-12 18:22:17. See below the changes in each version.
Ninja Sudoku - Hints & Solver version 4.0.4
Updated At: 2026-04-07
Changes: 1. Android SDK Compatibility improvements.
2. Improved dark theme display for better contrast and visual comfort.
3. Minor bug fixes to improve overall app stability and performance.
Ninja Sudoku - Hints & Solver version 4.0.3
Updated At: 2025-10-30
Changes: Improved compatibility with the latest Android version and devices.
Ninja Sudoku - Hints & Solver version 4.0.2
Updated At: 2025-07-31
Changes: 1. Add support for manual input for the custom game and solver.
2. Number first mode add feature to un-select selected number by tapping it again when selected.
Ninja Sudoku - Hints & Solver version 4.0.1
Updated At: 2025-05-11
Changes: 1. Added support for scanning Sudoku not only with the camera but also by allowing users to choose an image from their gallery.
2. Minor bug fix for v4.0.0
Ninja Sudoku - Hints & Solver version 4.0.0
Updated At: 2025-05-05
Changes: 1. Use the phone camera scan to input Sudoku
2. Allow the player to play the scanned game.
Ninja Sudoku - Hints & Solver version 3.1.4
Updated At: 2022-09-09
Changes: 1. Add display Sudoku board in the format of the local language, need to enable this in the settings.
2. Killer Sudoku calculator and combination hint improvement so it will not cover the Sudoku board when popup.
3. Fix resume game sometime lost game id issue
4. Remove non-compliant SDK for Google Play
Ninja Sudoku - Hints & Solver version 3.0.3
Updated At: 2021-12-11
Changes: Fix app crash on the Android 12 system
Ninja Sudoku - Hints & Solver version 3.0.0
Updated At: 2021-10-01
Changes: 1. Add Jigsaw Sudoku type
2. Add favorites and game notes
3. Allow user to clear all gaming data and start from scratch
4. Fix bug for user input notes
5. Add multiple cells note functionality
6. Add a help section to show different functionalities in the app
7. Killer calculator and combination calculation improvements
8. Other minor improvements and bug fix
Ninja Sudoku - Hints & Solver version 2.0.1
Updated At: 2021-01-13
Changes: 1. Fix app crash on some devices.
2. Bug fix and stability improvement for the v2 release
Ninja Sudoku - Hints & Solver version 2.0.0
Updated At: 2021-01-10
Changes: 1. Killer Sudoku game set(more than 40,000 killer sudoku games in five levels) and a corresponding logic hint system
2. Add killer sudoku specific solving techniques explanation
3. Other minor fixes and improvement
Disclaimer
Official Google Play Link
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