Free, easy-to-use Sudoku with puzzles in levels from absolute beginner to experts and beyond. All puzzles are tested and comes with a timer with par time, median time and world record time to beat. To help you improve your results there are ranking/world ranking, statistics and performance graphs, as well as mental age estimate. A built-in tutorial will get you started and helpers can be turned on/off as you like. Two playing modes for fast playing early and late in the game. There is even a "paper experience" mode for those who like to play Sudoku with pencil and paper. Solve the daily challenge and get extra points to improve your ranking! Offline puzzles - no need for an internet connection.