Sudoku is a logic-based number game where you fill a 9×9 grid so that each column, row, and cell contains the numbers 1 through 9. Playing it can improve your memory and reduce stress. We've collected the best offline sudoku games for when you want to solve some puzzles without an internet or data connection.

Puzzazz is more than an iOS device sudoku app. It also offers crosswords, cryptograms and other puzzles. The sudokus are hand-crafted and the NYT crosswords are accurate.

Microsoft Sudoku works offline or with the Xbox network. It has six difficulty levels, a featured Sudoku of the Day, irregular and icebreaker modes, and more. You can save your progress if you have an Xbox network account.

This offline sudoku game has both iOS and Android versions. Save your progress, play four difficulty levels and enjoy automatic error checking.