Sudoku Classic – Soku

Classic 9×9 Sudoku, free on iPhone and iPad. Four difficulties, hints, a timer, Dark Mode and Game Center. No account. A calm logic puzzle for your brain.

Soku is classic 9×9 Sudoku — free, focused, and made for your brain.

Choose Easy, Medium, Hard, or Very Hard. Fill every row, column, and 3×3 box with the numbers 1 to 9. No repeats. Just logic.

Play a quick puzzle on the train or settle in for a longer session. Soku stays out of the way so you can think.

WHY SOKU • Classic Sudoku, nothing extra — a clean 9×9 grid • Four difficulty levels, from beginner to Very Hard • Hints when you get stuck • Undo and reset if you want a fresh start • Error tracking so you can learn from mistakes • On-screen timer to beat your own time • Completed-number tracker to see what is left • Dark Mode for late-night puzzles • Game Center leaderboards for each difficulty • Free to play on iPhone and iPad • Small download (about 7 MB) • No account. Puzzles are generated on your device

HOW TO PLAY

1. Pick a difficulty.
2. Tap a cell, then tap a number.
3. Each digit from 1 to 9 can appear only once in its row, column, and 3×3 box.
4. Use a hint if you need a nudge — or play it pure.

A CALM BRAIN GAME Sudoku is a number puzzle and a logic workout. A few minutes a day can sharpen focus and problem-solving. Soku is built for that habit: offline-friendly play, a readable board, and no sign-up wall.

Soku includes optional ads to keep the game free. If you enjoy a quiet grid and a fair challenge, download Soku and start a puzzle today.

If you like classic Sudoku, a rating or a short review helps other players find it. Thank you for playing.