Sudokyu
Simple Sudoku App. No Ads
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Sudokyu is a clean, fast Sudoku game with everything you need and nothing you don't. Three difficulty levels, pencil notes, hints, undo, and a timer — all in a beautiful interface that works offline.
No account needed. No ads. Just tap and play.
**TAP TO PLAY**
Select a cell, tap a number — it's that simple. Every puzzle is uniquely generated with a guaranteed single solution, so you'll never hit a dead end caused by ambiguity.
**PENCIL NOTES**
Toggle pencil mode to mark candidate numbers in any cell. Keep track of your logic and narrow down possibilities the way you would on paper.
**SMART HINTS**
Stuck on a tough puzzle? Use hints to reveal the correct value for a cell. Three free hints per game help you learn without giving everything away.
**UNDO ANYTIME**
Made a mistake? Undo as many moves as you like. Your full move history is preserved so you can backtrack confidently.
**THREE DIFFICULTY LEVELS**
- **Easy** — Great for beginners and quick sessions
- **Medium** — A satisfying challenge for regular players
- **Hard** — Fewer given numbers, more logic required
**TIMER & PROGRESS**
A built-in timer tracks how long each puzzle takes. Pause and resume whenever you like — your game state is automatically saved, so you'll never lose progress.
**LIGHT & DARK THEME**
Switch between light and dark themes to match your preference or environment. Both modes are carefully designed for readability and comfort.
**WORKS OFFLINE**
No internet connection required. No account to create. No data uploaded anywhere. Your puzzles and progress stay on your device.
**FREE TO PLAY**
Play up to 3 games per day for free. Upgrade to unlock unlimited puzzles.
**MADE BY ONE DEVELOPER**
This was created by one developer who loves Sudoku. Purchases will help support more features and maintenance of the software.
Download Sudokyu — clean Sudoku, zero distractions.
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Privacy Policy: https://app.notion.com/p/Sudokyu-386dd23483c980a68cffd5eeee53b0bd
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
1.5.0 has new color themes for Premium Users
The developer, Kalon Cheong, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kalon Cheong
- Size
- 38.6 MB
- Category
- Puzzle
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Sudokyu Lifetime Access $9.99
- Sudokyu Pro Yearly Subscription $4.99
- Sudokyu Pro Monthly $0.99
- Copyright
- © Kalon Cheong 2026