Comfortable Sudoku

Details

Comfortable Sudoku is a easy-to-use and intuitive interface Sudoku. Sudoku is a logic-based,number-placement puzzle. The objective is to fill empty grid with digits so that each column, each row, and each of the nine 3×3 block that compose the grid contains all of the digits from 1 to 9. Comfortable sudoku features: -Press and hold a grid, you can enter a number directly. -10 different levels of difficulty -Three input modes -Undo / Redo -Hint mode