Pure Sudoku
DAILY SUDOKU, YOUR WAY
Daily Sudoku, smart notes, offline-friendly play, and real-time friend races in a clean experience across iPhone and browser.
Get Pure Sudoku on your iPhone for faster starts, better touch controls, and a cleaner daily routine.
Download on the App Store Also available on the App StoreDaily challenge, smart notes, and friend races included.
Browser Preview
Try Pure Sudoku online before you install.
Web play is available as a quick preview. If you want the best daily experience, download the iPhone app above.
Today's puzzle Today
Be the first to set a time today.
Prefer solo practice? Pick a difficulty to generate a fresh board instantly.
Today's puzzle Today
Be the first to set a time today.
Pick the difficulty you want to race.
How do you want to play?
Why download Pure Sudoku on iPhone?
Pure Sudoku is built to make daily play feel fast, focused, and easy to return to. Install the app for a cleaner touch experience, quick access to your next board, and a stronger habit around daily challenge play.
Why players install Pure Sudoku
- Clean touch controls designed for focused iPhone play.
- Daily challenges, smart notes, and hints in one faster routine.
- Offline-friendly access when you want Sudoku without browser friction.
- Performance tracking and friend races that make it easier to come back every day.
Still want to try it in the browser first?
Browser play is available for a quick preview. You can test a puzzle online, then move to the iPhone app when you want the primary experience.
How to Play Sudoku: Rules & Basics
Sudoku is a logic-based number puzzle played on a 9x9 grid. Fill the grid so each row, column, and 3x3 box holds the digits 1 through 9 exactly once.
- The Grid: 81 cells divided into nine 3x3 regions (often called boxes or subgrids).
- The Rule of One: Each digit 1-9 appears only once in every row, column, and box.
- No Math Required: No arithmetic; just logic, scanning, and clean deductions.
Mastering Sudoku Strategy
When puzzles get tougher, lean on these core tactics to lower your times in multiplayer races.
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Scanning (Cross-Hatching)
Pick a digit and scan rows and columns to see where it cannot go. Often one cell remains inside a 3x3 box, letting you place it instantly.
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Pencil Marking (Candidates)
Use Pencil Mode to jot possible digits in a cell. Noting options like 4 or 7 keeps patterns visible for advanced techniques.
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Single Candidate Elimination
Check a cell’s row, column, and box. If every digit except one is present (say only 4 is missing), you’ve found a naked single.
Why Play Multiplayer Sudoku?
Pure Sudoku takes the classic solitary experience and adds a competitive edge.
- Speed Training: Races force faster pattern recognition than solo play.
- No Guessing: Every board has a unique, logic-only solution—never guess.
- Distraction-Free: Clean interface, no banner ads or pop-ups; just you and the grid.
Free Sudoku Online FAQ
Can I play Sudoku online for free?
Yes. Pure Sudoku runs in your browser, so you can start a free Sudoku puzzle without downloading an app.
Which Sudoku level should I start with?
Start with Easy if you are learning, Medium for steady practice, and Hard or Expert when you are comfortable using notes and elimination.
Does Pure Sudoku work on phones?
Yes. The board, keypad, notes, hints, and daily challenge are designed for mobile, tablet, and desktop browsers.
Can I play Sudoku with friends?
Yes. Use Multiplayer to invite a friend with a private link, join with a code, or find a quick match.