★ Top Developer (awarded 2011, 2012, 2013 and 2015)★
Sharing the same top quality gameplay, graphics and interface as the rest of our app library, AI Factory's Sudoku is an essential download for any Sudoku or brain training fan! You never need a paper puzzle again!

- 2500 Sudoku puzzles over 5 difficulty levels, covering easy through to medium, hard, and extreme levels

- Various different modes for notes input to cater for all playing styles

-Pre-fill notes option

-Auto-clear notes option

- Optional hints, undo and board aids

- 4 fonts/sets of symbols & 3 boards

- Statistics tracking, including fastest times, average times and completion % for each level

- Super smooth interface and graphics

- Suitable for both Phones and Tablets

This free version is supported by 3rd party ads. Ads may use internet connectivity, and therefore subsequent data charges may apply.

// Option A //

To download Sudoku mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Sudoku mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Sudoku from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Sudoku in HappyMod App.