Sudoku: Classic Number Puzzle

Sudoku is a beautifully redesigned classic sudoku - the number puzzle and brain game loved by millions, rebuilt for calm, eye-friendly play. Whether you crave a quick logic puzzle on a coffee break or a deep sudoku challenge before bed, every puzzle here is a pleasure to solve. Free sudoku, offline, with a calm, distraction-free board.

WHY YOU'LL LOVE SUDOKU
- 100% free sudoku - play offline anywhere, no Wi-Fi needed.
- A gorgeous teal & amber design built for low eye strain and easy reading.
- Colorblind-friendly color roles: clues, your input, the selected number, the active region and matching numbers each get their own color, so the board never confuses you.
- Light, Dark and Sepia themes for day, night and everything in between.
- Undo, erase, notes and pencil marks - all the tools a good sudoku puzzle needs.
- Every puzzle has a single unique solution. Made for phone and tablet.

6 FAIR DIFFICULTY LEVELS
From easy sudoku to Extreme, every grid is graded by a human-solver simulator - so the difficulty you pick is the difficulty you get. Beginners learn the basics with easy sudoku, while experts can battle truly hard sudoku and expert sudoku that demand advanced logic. Six levels - Easy, Medium, Hard, Expert, Master and Extreme - mean there is always a number puzzle for your mood and skill level.

SMART HINTS THAT TEACH YOU
Stuck on a tricky logic puzzle? Our smart hint does not just hand you the answer - it shows the NEXT logical move and names the technique behind it, from Hidden Singles to Naked Pairs, so you actually get better at sudoku. Flip on Auto-Notes to fill candidate numbers and pencil marks instantly, then focus on the fun part: the logic.

DAILY SUDOKU CHALLENGE
A fresh daily sudoku for everyone, worldwide, every single day. Take on the same sudoku challenge as players around the globe, build your streak, chase the perfect win and unlock achievements. Come back tomorrow for a brand-new daily puzzle - the easiest way to make sudoku a relaxing daily habit.

TRACK YOUR PROGRESS
- Win streaks and perfect-win tracking
- Achievements to unlock
- Detailed statistics for every difficulty level

OFFLINE BY DESIGN
Sudoku is the offline sudoku for real life - commutes, flights, waiting rooms. No internet required, just you and the number game. This is the clean, calm sudoku experience: distraction-free where it matters most, while you think.

THEMES & COMFORT
Switch between Light, Dark and Sepia themes to match the time of day. The eye-friendly teal & amber palette keeps long sudoku sessions comfortable, and the colorblind-friendly design keeps the board clear for everyone.

PERFECT FOR
- Sudoku for adults who want to relax and unwind
- Brain training fans who love brain games and logic puzzles
- Anyone who wants a clean puzzle game with no clutter
- Players from a first-time solver to an expert sudoku master

HOW TO PLAY SUDOKU
Fill every row, column and 3x3 box with the numbers 1 to 9, no repeats. Simple rules, endless depth - that is why sudoku is the world's favorite number puzzle and brain game. No math required, just pure logic.

FEATURES AT A GLANCE
- Free classic sudoku, the original 9x9 number game
- 6 difficulty levels: Easy, Medium, Hard, Expert, Master, Extreme
- Smart hints that teach techniques + Auto-Notes and pencil marks
- Daily Challenge, streaks, perfect wins, achievements & statistics
- Eye-friendly teal & amber design, colorblind-friendly colors
- Light, Dark and Sepia themes
- Offline sudoku, calm distraction-free play
- Undo, erase, notes & unique-solution puzzles
- Phone and tablet support

Sudoku is the perfect brain game to relax, sharpen your mind and train your logic - one number puzzle at a time. If you love classic sudoku, daily sudoku, logic puzzles, number games and brain training, Sudoku is your new home.

Download Sudoku free and start your first puzzle today!