Conceptis Sudoku

Top Sudoku app in Japan! Play six different Sudoku variations in a single app. Start with classic Sudoku grids and advance to Diagonal Sudoku, Irregular Sudoku and OddEven Sudoku - each with a different look and a unique twist of brain challenging logic. Huge brain-bashing Mega Sudoku puzzles, also known as Monster Sudoku, are offered for tablet only.