With Sudoku you now have the famous logic puzzle always with you - for free and offline. Infinite number of Sudoku games guarantee unlimited gameplay. Choose your level of difficulty, use the additional help functions, celebrate your achievements and conquer the leaderboards. With this free Sudoku game you will never run out of puzzles again! • Infinite number of Sudoku games by random generation of puzzles • Fully usable offline • 4 Sudoku difficulty levels: from EASY to VERY HARD • Notes as on paper • Automatic saving & loading of the Sudoku game state • Achievements and leaderboards using Google Play Games • Free and offline • Optimized for Smartphone and Tablet Optional help functions: • Input buttons are dimmed if a number is used 9 times (or more) in the Sudoku puzzle • Automatic checking whether the newly entered number is correct • Highlighting of row, column and box of the currently selected field • Highlighting of all fields which have the same value as the currently selected input button NOTE: This Sudoku includes advertisements to allow offering this game for free. The app itself can be used offline / without an internet connection!