Kakuro - Cross Sums Puzzle

If you like crosswords but would rather work with numbers, Kakuro fits right in. Each run of squares adds up to the clue at its end, and no digit repeats inside a run, so filling the grid is part arithmetic, part deduction.

Every Kakuro board is built on your phone, and each has a single fill you can deduce without ever guessing. When a long run has you stuck, the built-in combination helper shows which digits can legally fit, the same trick regular solvers keep on a cheat sheet. Pencil marks let you jot candidates before you commit.

• Four sizes from a gentle 6x6 up to a 9x9 that will keep you busy
• A check button that flags a wrong entry before it spreads
• A new puzzle every day, then as many more as you want

No sign-up and no connection needed, so a waiting room or a long flight is plenty. The numbers stay large and clear even on a small screen.

Made for number-puzzle people who've done their share of Sudoku and want sums instead of singles.