Puzzle · iPhone, iPad & Android
Sudoku, two ways. No internet needed.
Solve the classic 9×9 Sudoku you know and love, or try ZooDoku: the same rules with cute animals instead of numbers, as you travel through 20 cities.
- 100% offline
- Easy to Expert
- 50 languages
One app, two games
Pick your favourite way to play.
Choose from the home screen. Your progress in each game is saved separately, so you can switch any time.
Game 1
Classic Sudoku
Fill every square so that each row, column and 3×3 box has the numbers 1 to 9 once. No maths, just logic.
- Four levels: Easy, Medium, Hard and Expert.
- Notes and Auto notes for small candidate numbers.
- Smart highlighting of every copy of a number.
- Hints, mistake check, undo and continue later.
Game 2
ZooDoku: Sudoku with animals
The same rules, but you place 9 animals instead of numbers. A friendly first Sudoku for kids and beginners, and a fresh twist for experts.
- Travel 20 cities: Sydney, Tokyo, Cairo, Paris, Rio and more.
- Collect every animal, each with a fun fact.
- Hints that teach why an animal fits.
- Easy 3-step guide and big, clear pictures.
Features
Made for every player.
Daily challenge
A new puzzle every day. Keep your streak and earn trophies.
Hints that teach
Stuck? A hint shows the next logical move and explains it.
Stats & achievements
Best times, wins and streaks for every level, plus badges to unlock.
Dark & light mode
Switch with one tap. Easy on your eyes, day and night.
50 languages
English, Arabic, Chinese, Spanish, French, Japanese, Hindi and more.
Auto save
Close the app any time. Your game is waiting when you come back.
Screenshots
Take a look inside.
Tap a screenshot to see it bigger.
How to play
Learn Sudoku in one minute.
The rules are the same in both games.
Look at the grid
9 rows, 9 columns and 9 boxes of 3×3. Some squares are already filled in.
One of each
Every row, column and box needs each number 1–9 (or each of the 9 animals) once.
Use logic
Find a square where only one answer fits. Each answer makes the next one easier.
FAQ
Questions & answers
Is the game free?
Yes. Sudoku Offline Classic is free to download and play. It shows ads to support development.
Does it really work without internet?
Yes. Both Classic Sudoku and ZooDoku work completely offline. Ads and anonymous statistics are only sent when your phone is online.
What is ZooDoku?
Sudoku with animals. The rules are the same, but you place 9 animals instead of the numbers 1–9. You travel through 20 cities, unlock their animals and learn a fun fact about each one.
Is it good for kids?
Yes. ZooDoku's animal pictures, 3-step guide and hints that explain each move make it a great first Sudoku. Adults can play Classic Sudoku up to Expert.
Will I lose my progress if I close the app?
No. Your game, statistics, streaks and animal collection are saved on your device automatically.
How do I contact you?
Email [email protected] or visit the Support page.
Start your next puzzle today.
Free on iPhone, iPad and Android. Classic Sudoku and ZooDoku in one app.