Sudoku Ninja— Classic & Killer

Sudoku Labs

Contains adsIn-app purchases

About this game

Sudoku Classic and Killer Sudoku 2-in-1.

Discover the ultimate combination of Classic Sudoku and Killer Sudoku in one game! Enjoy 40,000 beautifully crafted puzzles and make Sudoku a part of your daily life to sharpen your brain and improve memory.

Lots of challenging levels in both Sudoku Classic and Sudoku Killer modes for beginners and professional players. New to Sudoku? No problem! Our app is designed to make learning both modes effortless and enjoyable. Start with beginner-friendly levels and gradually master both Classic and Killer Sudoku with ease, thanks to the seamless integration of these two Sudoku game modes.

Take on the challenge, sharpen your mind, and enjoy the best of both Sudoku worlds!

🌟 Relax & Enjoy: Our Sudoku classic & sudoku killer game is designed to help you relax and immerse yourself in a calming experience. With a peaceful environment, smooth gameplay, and lotus flowers softly blooming on your screen, every detail—from gentle animations to subtle sound effects—contributes to a peaceful Sudoku escape.

Game Features:
• Magic Pencil: Fill in pencil notes with just one tap,
• Leaderboards: See how your completion times compare with players around the world.
• Five Difficulty Levels: Start with easy puzzles or push it to the limit with medium, hard, expert, or the unbeatable Invictus level!
• Daily Challenges: Take on fresh puzzles every day and collect unique figurines.
• Pick Any Puzzle: Got a few puzzles on the go? No problem—pause and return to them whenever you like.
• Select Classic or Killer mode at any time for regular and daily puzzles,
• Constant Updates: Keep your mind sharp with new puzzles added every week.

Additional Perks:
🥋Autofill Notes: Quickly complete pencil marks to speed up your play.
🌍 Social Sharing: Share your accomplishments and invite friends to play via Instagram, Facebook, Twitter, and other platforms.
🎨 Customization: Enjoy a fresh and modern material design with adjustable colors, fonts, and themes.
💾 Cloud Sync: Save your progress across multiple devices,
⚡ Fast Input Mode: Designed for seasoned players, allowing you to input digits faster than ever.
✔️ Error Highlighting: Spot mistakes easily with customizable highlighting settings,

Designed for Sudoku lovers of all skill levels, lots of puzzles are hand crafted by the "Sudoku Labs" team, ensuring you get a premium experience!

Ratings and reviews

Very well done sudoku app. After a certain period you do get an ad after every game, but all ads show a timer and skip. None are intrusive during gameplay or open a browser to scam antivirus products. This developer is at least holding some integrity and respect for their customers. $12 flat price to remove ads rather than other shady developers that charge a monthly fee. -- Edit: After some time I find the ad practice doesn't change. This company values its customers'wishes.

7/26/25 Update is terrible. I got this game earlier this year-it was perfect: a prompt to take you to a game center when you open it, then nothing else intrusive....until now. Imagine playing your first puzzle in the morning and when you fill that last box, even before you can move your finger away, the screen changes and you are hit with an ad for some military game with crazy gunfire-set off my anxiety...what a shame. And no way to exit it until it plays through. Total fail on this update😒👎

I am getting a star for finishing my daily calendar game but when I go back in to play my game the Star is no longer there so I can't tell which ones I finished. The weird thing is that three in August, the 26,27 and 28, still show up but none of them have been saved since then.

What’s new

Fixed some bugs. Premium purchase bug fixed.
Thank you for playing Sudoku by Sudoku Labs!