Discover your Brain Score and improve it every week!
About Sudoku Ninja: Classic & Killer
Sudoku Ninja: Classic & Killer is a puzzle app developed by Sudoku Labs.
Download Statistics
Sudoku Ninja: Classic & Killer has been downloaded 39 thousand times. In the last 30 days, the app was downloaded 5.9 thousand times.
User Ratings
Sudoku Ninja: Classic & Killer is rated 4.67 out of 5 stars. The rating is based on 630 ratings.
App Information
Sudoku Ninja: Classic & Killer is FREE to download. The APK download size is 38.75 MB. The latest version available is 2.8.3. The last update was on June 19, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play September 2024.
Description
Play Classic and Killer Sudoku. Discover your Brain Score and watch it climb every week!
Enjoy a relaxing offline sudoku experience with 40,000 puzzles! Train your brain and sharpen your logic with daily challenges and logic puzzles for every skill level.
Whether you're a beginner or a pro, this sudoku puzzle game offers everything you need — from easy levels to expert challenges. Learn quickly, play smoothly, and master both Classic and Killer Sudoku at your own pace.
Take on daily sudoku challenges, sharpen your logic, and enjoy a refreshing take on brain training!
🧠 Brain Score (NEW!) How sharp is your mind? Take a quick 7-minute brain test — pure visual logic, no math, no rules to memorize. Play daily for one week, then retake the test and watch your Brain Score climb. Track your progress across four skills: focus, speed, logic, and pattern recognition.
🌟 Relax & Train Your Brain Enjoy a calm and satisfying sudoku experience with smooth gameplay, gentle animations, and a clean design that helps you focus. Perfect for both quick sessions and deep concentration.
🧩 Game Features • 40,000 Sudoku Puzzles – Endless free sudoku content for beginners and experts • Classic & Killer Sudoku Modes – Switch anytime between two popular logic puzzle styles • 5 Difficulty Levels – Easy, Medium, Hard, Expert, and Invictus for true masters • Daily Challenges – Play new puzzles every day and earn unique rewards • Offline Play – Enjoy sudoku anywhere without internet • Magic Pencil & Autofill Notes – Add and manage notes instantly • Fast Input Mode – Optimized for experienced players • Error Highlighting – Customize how you detect and fix mistakes • Cloud Sync – Continue your game across devices • Leaderboards – Compete with players worldwide • Pick Any Puzzle – Pause and resume anytime
🥋 Sudoku Ninja Mode (NEW!) Experiment freely like in a sandbox! In Ninja Mode, mistakes are not counted or shown — perfect for testing strategies and learning. Apply your changes to the grid when you're ready, or roll back to your last checkpoint anytime.
☕ Sudoku Coffee Mode Set a time limit and challenge yourself! The harder it gets, the more bonus points you earn — perfect for quick, intense sessions.
🎨 Customization & Social Features • Modern design with themes, colors, and fonts • Share your progress with friends on social media • Regular updates with new puzzles every week
Designed for all sudoku lovers — from casual players to hardcore puzzle solvers. Many puzzles are hand-crafted by the Sudoku Labs team to ensure a premium experience.
Download now and become a true Sudoku Ninja!
Recent changes: New "Brain Score" logic added. Thank you for playing Sudoku by Sudoku Labs!
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and key performance statistics — useful for competitive research or tracking your own app.
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Comments on Sudoku Ninja: Classic & Killer for Android
★★★★★Ram· Feb 13, 2025
This is one of the best Sudoku apps I have used! The app runs quickly and smoothly, with no confusion on my end. I have had no issues playing sudoku, and it is really entertaining! I like the minimal amount of advertisements; it makes the gameplay more enjoyable. The sound effects and visuals make understanding Sudoku fun and easy. Great app!
★★★★★ye saya· Aug 14, 2025
Best sudoku app ive found so far. And It's way challenging than most killer sudoku out there. I just completed my first Invictus level with no mistakes and without using hints!
★★★★★Jo Marie (Good Things Happen)· Feb 12, 2025
Fun Free Sudoku! No more lugging around Sudoku books in my purse! I enjoy playing whenever I want for free! Fun games. I enjoyed playing very much.
★★★★★Lys Vidnik· Feb 12, 2026
Best sudoku app with actually minimal adds. The adds only appear after your game is over 🙌
★☆☆☆☆Greg Hobbs· Nov 20, 2024
It takes longer to exit out of adds now compared to when I first started playing. Why is that. This is the reason I will uninstall your game. It is frustrating. Please EXPLAIN! And don't tell me they're no longer, because you know they are!
★☆☆☆☆Stanislav Pejak· Apr 6, 2026
The latest update ruined the experience for me. The color scheme is awful, game does not keep my personal bests, only from this day. Big downgrade.
★★☆☆☆Santosh Lamichhane· Oct 15, 2025
Latest update has bugs. The pencil marks of killer sudoku overlaps the cage value, which makes it unreadable. Please update. Also, turn the pencil brown in pencil mode.
★☆☆☆☆Kadi· Jun 10, 2026
The creator is all over reddit telling people to download this app because there are no ads. BUT THERE ARE ADS. Uninstalling
Google Play Rankings for Sudoku Ninja: Classic & Killer
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Technologies used by Sudoku Ninja: Classic & Killer
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