Train your brain at any moment, the best way to learn and improve your skills in this classic puzzle game. Enjoy a fun Sudoku game, with thousands of free Sudoku puzzles for both beginners and advanced players. It has a clear, easy to read and customizable Sudoku board, 5 difficulty levels ranging from "Flash" to "Hard". If you like logic, number-based puzzles, you will love these classic Sudoku puzzles! With Sudoku :-), you won't be looking for a paper sudoku puzzle ever again! Features: * Clear interface. No Banner Ads * 5 difficulty levels * Thousands of puzzles * Pencil marks (a.k.a. Notes) available * Undo to fix mistakes * Auto-save * Errors checking (manual and automatic) * Conflict and error highlighting * Universal: iPad, iPhone, and iPod touch * Hints, that help you get past that hurdle * Pick the theme that best suits your style Download Sudoku and find more features that will help you become a Sudoku master! Take the Sudoku :-) brain training challenge now!