Train your brain with Sudoku Classic, the free logic puzzle for all puzzle fans! Improve your skills with Sudoku Classic, the most popular number puzzle game for players who like to exercise their brain! Sudoku Classic for your smartphone or tablet is completely FREE and easy to learn. Object of the game is to fill the 9x9 grid with numbers. Each column, row and 3x3 block can contain the numbers 1 to 9 only once. Select your level of difficulty and choose between two input options for a comfortable game experience. All grids are generated randomly for hours of fun! Features: - Classic, elegant design with a simple and user-friendly interface - Optimized for both landscape and portrait mode - Two different input options: cell first or number first - Free 'Hint' mode fills in a correct number - Daily Challenge mode - Four levels of difficulty for all types of players, from beginners to experts - Endless, random puzzles with unique solutions - Helpful statistics to keep track of your game progress - Game saves unfinished levels automatically - Highlight system for selected numbers - Easy controls: double tap to remove numbers from cells