Kakuro Crunch is cost free, has no ads, and we collect no data. It's a hobby.

Until the Big Crunch, you can create and solve as many Kakuro (Cross Sums) puzzles as you wish in over 200 small to huge sizes!

Kakuro Crunch creates Cross Sums puzzles or Kakuro puzzles, which are challenging and addictive for logic problem enthusiasts! Kakuro's clues are the sums of the digits you must fill in to solve a puzzle. Cross Sums puzzles are simply crossword puzzles with numbers.

Manual or automatic (default) puzzle creation is now easier than ever!

Originally released for sale in 1998 as X-Sums 98, Kakuro Crunch has a proven algorithm for generating Kakuro (Cross Sums) puzzles. Every puzzle has exactly one solution.

A major puzzle magazine also published many of our Cross Sums puzzles throughout the years, starting in 1995.

Built-in solving aids: Enter up to six, small trial digits per square. Get hints. Show errors. Correct Errors. Show the solution. Optional audio warning for duplicate digits or incorrect sums.

You can create new Kakuro puzzles and optionally save, open, print, and delete them.

You can select one or more saved Kakuro puzzles and export them as a ZIP file.

You can import one or more Kakuro puzzles, whether they are loose or contained within a ZIP file.