Nine cats, one home, 2,000+ puzzles.

Catkuro is kakuro, the number crossword, turned into a journey. Fill each run so it adds up to its clue and never repeat a digit. That is the whole rule. Start with four feline friends, bring five more home through Act 1, then fill their home with cozy places and favorite things.

Free to play. One optional purchase permanently removes banners and interstitial ads. Optional rewarded help remains available whenever you ask for it. Never a subscription.

The Catkuro home screen, showing the adoption path and the cats already home

A Catkuro board mid-solve, with cat digits inked and colored pencilmarks

Free Play in Catkuro, showing the four puzzle tiers

How to play

Three rules. That is the whole game.

You do not need to know kakuro to start. The story teaches it, one small board at a time, and the first one is four cats and a handful of squares.

Add up to the clue

Every run of white squares has a number at its head. The digits you write must add up to exactly that.

Never repeat inside a run

One to nine, each at most once per run. A run of two adding to seventeen can only be eight and nine.

Let the crossings decide

Each square belongs to two runs at once. Where the two agree on a single digit, you have your answer.

Seventeen across can only be 8 and 9. Sixteen down can only be 7 and 9. So the square they share has to be the 9, and the rest of the corner falls out from there: 9 + 8 = 17, 7 + 5 = 12, 9 + 7 = 16, 8 + 5 = 13.

Want the long version? Our beginner walkthrough solves a full board with you, and the combinations chart lists every sum worth memorizing.

What you get

A journey, a library, and a puzzle every morning.

Twenty-five chapters

Five storybook Acts, a trail of paw prints that inks in as you go, and something new in the scene at the end of every chapter.

The digits are cats

Nine cats with names, colors, and personalities, right there on the keypad. Start with four, and bring five more home through Act 1.

Starts tiny, grows with you

Your first board is a handful of squares and four digits. By the last chapter you are solving grids that would have looked impossible on day one.

Then 2,000+ more

Finish the story and all four Free Play tiers open at once, from Kitten Steps to Purrfect Puzzlers.

A daily challenge

Once Free Play opens, a puzzle a day lands with it: the same one for everyone on the same date, with no account and no connection needed.

Tools that teach

Pencilmarks in five colors for chasing more than one idea at once, a combination row that shows every way the current clue can be made, and unlimited undo so nothing you try is ever expensive.

No ad interrupts your solve. Ever.

While a puzzle is open, the screen is yours. No banner, no pop-up, no watch this to continue. Optional rewarded help is always your choice: reveal the selected cell or fill the grid with pencil marks. Deduction hints remain free. You never have to ask.

Ads appear between puzzles and on the menus, and that is what keeps everything free. One optional purchase permanently removes banners and interstitial ads. Optional rewarded help remains available whenever you ask for it.

A design contract,
not a setting.

Your clowder

Meet the nine.

Pip sits in the sun. Beans has opinions about the sofa. Onyx turns up at midnight like he owns the place, and honestly, he might. Four are already home. Act 1 brings the other five, and the later Acts fill the house with cozy places and favorite things.