Sudoku: Puzzle Brain Game

Classic 9x9 sudoku plus seven variants, a new grid every morning, and hints that explain the logic instead of just handing you the number.

Sudoku the way solvers actually play it: classic 9x9 grids, four difficulty levels, and a fresh challenge waiting every single morning.

Most sudoku apps give you one board and a stopwatch. This one is built for the long game. Every puzzle is generated on your iPhone and verified to have exactly one solution, so no board ever forces you to guess. When you get stuck, a hint does not just drop a number in — it names the logic that put it there ("Naked Single: only one number can go here"), so the pattern sticks for the next grid. And when the classic 9x9 stops being a challenge, seven variants are waiting.

WHAT YOU GET

• A new Daily Challenge every morning, with a streak counter and a month calendar that shows the days you did not miss
• Four difficulty levels — Easy, Medium, Hard, Expert — so the grid is never trivial and never unfinishable
• Seven puzzle variants beyond the classic board: Diagonal, Hyper, Irregular, Killer, Color and Giant 12x12 and 16x16
• Hints that explain the reasoning instead of just filling a cell, plus a techniques library covering Naked Single, Hidden Single, Naked Pair, Naked Triple, Hidden Pair, Pointing Pair and Box-Line Reduction
• Pencil notes, undo and redo, auto-check for errors, row/column/box highlighting and a hide-used-numbers option — the tools that make Expert boards finishable
• A stats dashboard with games played, win rate, best time per difficulty, current and best streak, total mistakes and hints used, plus 17 achievements to chase

PERFECT FOR

• Commuters and waiting-room players who need a puzzle that works with zero signal
• Beginners who want Easy boards next to a plain-English guide to the techniques that solve them
• Experienced solvers hunting Killer, Irregular and 16x16 Giant grids
• Anyone building a daily habit — one puzzle each morning, streak intact

WHY NOT JUST DO SUDOKU ON PAPER? Paper will happily let you build ten numbers on top of a wrong one before you notice. Auto-check flags the mistake the moment you make it, undo walks back a bad guess without an eraser hole, pencil notes vanish cleanly instead of smudging, and your best times and streaks get counted for you. You also never run out — puzzles are generated fresh on demand, forever, with no newspaper and no internet.

PRIVACY Every puzzle, stat and streak lives on your iPhone. No account, no sign-up, no cloud sync, no tracking and no ads.

FULL ACCESS Sudoku Premium unlocks the full game: all four difficulty levels, the Daily and Weekly Challenges, Endless and Time Attack modes, all seven variants, unlimited hints, all 8 board themes and the advanced stats dashboard. It is available as a weekly subscription, a yearly subscription, or a one-time lifetime purchase — pick the one that fits, and restore it any time on your other devices.

Open today's challenge and start your streak.

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