Sudoku by Volcano is the best puzzle game you can find for your phone and tablet, and it'll help you to learn and improve your skills in the sudoku game.
With our hint system, it'll teach you all the skills you need to solve the puzzle with every step, and the instructions are very easy to understand, also with helpful animations and colorful visual effects. The hint system will not only tell you the answer but also help you to understand why the answer is. In the training mode, it'll be with you whether you're completely new to this game, or the way to the expert.

We created this innovative free game with several various key features:
★ Sudoku variations such as squiggly, X and Color
★ 8 difficulty levels from very beginners to the expert
★ Hint system will help to learn how to solve the puzzle, not only the answer but also why the answer is
★ Career statistics to keep track of your game progress
★ Global leaderboard and achievement, which you can share or compete with your friends or others
★ You can update your puzzle from the server at any time, without re-installing the game
★ Compete with global players in the Champions Challenge and win the bounty
★ Custom puzzle can let you create your own puzzle as composed by yourself, or from the papers
★ More than 15000 puzzles are waiting for you

during the game, you will be able to
★ Auto highlighted numbers for intelligent hint
★ Use pencil marks
★ Double-tap the cell to erase numbers
★ Use various kind of items, like check the errors
★ Unlimited redo & undo

you can also found more useful functions like
★ You can share to your friends via Google+, Twitter, and Facebook
★ Auto-save, you can pause at anytime you like without losing any progress
★ Use Dark mode in the night to protect your eyes
★ Timer, you can also disable it in settings
★ Selected cell highlighting
★ Incorrect digits mark
★ Enchanting visual effects
★ Various numerals like Chinese or Roman
★ Universal App looks great on phone and tablet
★ Give us feedback in the game, with your help we'll make it better

We hope you will enjoy the stunning designs of our sudoku, it's really a brain teaser game which helps to work out your brain! All for FREE!