This app is more than a simple Sudoku app.We have put a lot of thought into the time allotted to solve each puzzle.-Time Attack Mode Available! Challenge solving puzzles as fast as you can! Of course, every size of puzzles (4×4, 6×6 and 9×9) are playable for the time attack mode. You can try to break your personal record and challenge your limits. In addition, you can compete with players from around the world by speed.-Time BombUnlike Time Attack, these puzzles with time limits are designed to be enjoyed by a single player.Feel the pressure as you try to solve the puzzles before time runs out.-Battle SUDOKU Two players, one puzzle. Lock in more squares faster than you opponent.-Daily challengeDaily challenge puzzles make beginners more familiar by questing smiley emoji stamps every day.And complete Functions!· 3 sizes of puzzles (4×4, 6×6 and 9×9)· Different levels (simple, easy, medium, difficult, hardest)· Duplicates highlight (simple mistake prevention) · Pencil function (memo function)· Eraser function· Clear all function· Number first input method, which can be easily switched from Cell first method.Ranking Function Available!This app is also designed to make users feel like a game on top of the contentment of solving the puzzles. A certain number of points are added when each puzzle is solved. The number of points changes according to the level of difficulty. You can challenge the rankings every day as there are different types, such as those that last for a day, a week, a month, and forever.OthersWe promise to make improvements on both regular and irregular basis to make the game more enjoyable. We will read all the reviews carefully and take them into account, so please give us any feedback and improvement points that you would like to see done.Please try playing Sudoku in the way that can only be done in apps first!