Description: The classic puzzle game of Sudoku on your iPhone or iPod touch. Whether you are a novice or an advanced player, Satori Sudoku will provide endless hours of challenging puzzles. FEATURES - Game generator capable of producing millions of unique puzzles. - Multiple levels of difficulty. - Ability to 'pencil mark' a cell with possible answers. - Game state automatically saved and resumed. - Highlight mode that shows all valid cells for a selected number. - Auto mode that shows only the valid numbers for a selected cell. - Show errors mode that marks invalid answers. - Option to disable auto-lock (screen dimming). - If you get stuck and want to start over, simply shake your iPhone / iPod touch. - Auto-fill for pencil marks / notes. - Game timer (under verify) & best times. NOTE: Several older reviews talk about puzzles not having a unique solution. That problem was fixed months ago in version 1.1 "This is the only Sudoku app you need for the iPhone." - SeahawkFan "This is the best sudoku game out there." - ejc90 "Best sudoku on the iPhone." - Frankypelvis