Zero ads or paywalls
No banners, videos, subscriptions, paid hints, lives, currencies, or locked puzzles. Optional tips never unlock features.
Free means free
Just Sudoku.
No ads. Ever.
A fast, private, fully offline Sudoku game for iPhone and iPad. Every puzzle, hint, setting, and accessibility feature is free—optional tips unlock nothing.
- 600+ offline puzzles
- No advertising tracking
- No account required
Designed around the puzzle
Everything a Sudoku player needs. Nothing that interrupts.
Open Sudoku combines a calm native board with serious solving tools for beginners, experts, and everyone in between.
Fast and fully offline
Launch straight into 600 validated puzzles. Play, save progress, and use every core feature without a connection.
Hints that teach
Progressive hints identify the area, explain singles when available, and reveal a correct value only when you ask.
Powerful pencil notes
Use manual notes, automatic candidates, note cleanup, cell-first or digit-first input, and unlimited undo and redo.
Readable by design
Choose light, dark, high-contrast, and large-digit modes, with accessible board actions and hardware keyboard support.
Your progress, your choice
History stays local by default. Private iCloud sync and Sign in with Apple are optional and never required to play.
A classic brain puzzle without the baggage.
Choose from six skill levels, start with a beginner grid, or work through a Master challenge. Open Sudoku stays focused on logic—not streak pressure, pop-ups, or purchases.