Friendly Sudoku - Free Puzzle is a Sudoku game for Android with an easy-to-use interface, unlimited undo and hints, unlimited check marks, unlimited pencil marks, unlimited free hints, a variety of difficulty levels, customizable themes, and much more!

Sudoku is a logic puzzle that consists of a grid of numbers that must be filled in to achieve a certain goal. It has been known to have many benefits, such as improving logic and attention, and it has been widely played in many different countries.

The goal of the game is to fill the grid with numbers from 1 to 9, without repeating any numbers within the same row, column, or block. The numbers must be arranged in a way that will achieve the given goal. There are several ways to play, such as by entering numbers manually, randomly, or by using a sudoku generator.

There are many ways to play, such as on one device, on multiple devices, or on the web.