Astraware Sudoku has earned a reputation as one of the best Sudoku games available for portable devices. It is easy-to-use and packed with unique features that will challenge even the most avid Sudoku players! Astraware Sudoku includes these essential features: Number entry via touchscreen or number keys. Puzzle generator - creates an unlimited number of true Sudoku puzzles in the background whilst you play. It automatically creates more puzzles when you need them, so you never have to wait. Puzzle of the Day - download the puzzle for your chosen difficulty from the Sudoku of the Day webserver each day and once you've completed it, submit your time to see how you compare to other players worldwide! Enter your own - you can enter puzzles from magazines and newspapers and get help solving them. Multiple difficulty levels - perfect for players of all abilities, Astraware Sudoku offers a simple, usable interface and puzzles at 6 levels of difficulty. Assistance - includes many types of assistance including a Sudoku solver, manual and automatic pencilmarks, a smart hints system to give you helpful guidance without just showing you the solution, and hold-and-highlight for locating particular numbers or groups. Use these features to help you learn how to play Sudoku, improve your game and progress to higher difficulty levels! Astraware Sudoku will automatically save when you exit so you can return to your puzzle after.