What included? * Small puzzles - 4x4 * Medium puzzles - 6x6 * Regular size Killer sudoku from difficulty 1 to 10 * New puzzles every day! Features * Puzzles of various shapes and sizes * Simple and classic design * Marking multiple cells * Screen for possible combinations for each cell including check mark * Calculates the amount of marked cages * Supports all types of screens * Check for errors and clues * Sleep mode! Are you ready for a challange? Try now!