Sudoku isn't only the best puzzle containing numbers, also an excellent replacement for pen and paper! The app would suit both beginners and experts. The in-game experience is very convenient and has a few levels of difficulty to choose from. There are also many options in the game to tailor it to your needs. The interface is very simple but contains a staggering amount of over 10,000 puzzles. You'll never be bored! √ Challenge yourself figuring out your mistakes, or enable Auto-Check to see your mistakes as you go. ▣ Hints can guide you through the points when you are stuck. ▦ Make notes to keep track of possible numbers. Each time you fill in a cell, notes are automatically updated! ◆ Choose one of three appearances to play Sudoku with more comfort, even in the dark! ▸ Highlight duplicates to avoid repeating numbers in a row, column and block.