Free
About
Tertiary Sudoku is a clean, offline number-puzzle game for players aged 14 and up. 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
- Stats tab with your best times and scores per difficulty
- Feedback and About tabs built right in
- 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.
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What's New in Tertiary Sudoku
1.1
July 3, 2026
Now for ages 14 and up! • Simplified one-tap age confirmation — no ID, no verification • New bottom navigation: Home, Stats, Feedback, and About • Stats tab — your scores, best times, and full game history, always one tap away (stored only on your device) • Feedback tab — send us your ideas via WhatsApp • Easier play: clearer selected-cell highlight, a bigger number pad, and gentle haptic feedback • The Continue card now shows the difficulty and time of your saved game
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