Tertiary Sudoku
Classic number puzzles
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Unlimited Sudoku puzzles with four difficulty levels, smart hints, mistake tracking, pencil notes, and local high scores - all offline.
Tertiary Sudoku is a clean, offline number-puzzle game for grown-ups. Every puzzle is generated on your device with a guaranteed unique solution, so you never run out and never see the same grid twice. Choose from four difficulty levels - Easy, Medium, Hard, and Expert - and solve at your own pace.
- Four difficulty levels, from gentle warm-ups to ruthless Expert grids
- Smart hints whenever you ask - reveal the right number for any cell
- Pencil notes (candidates) with optional auto-cleanup
- Conflict and same-number highlighting you can toggle on or off
- Optional 3-strike challenge mode for mistake-free runs
- A timer, scoring, and full game history kept entirely on your iPhone
- 100% offline and private - nothing ever leaves your device
Track your best times and scores per difficulty, resume any game you leave, and train your brain one grid at a time.
Ratings & Reviews
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The developer, Alfred Ang, 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
- Alfred Ang
- Size
- 1.3 MB
- Category
- Puzzle
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Copyright
- © 2026 Tertiary Infotech Academy Pte Ltd