Just Kakuro
Learn the crossword of sums
Free · In‑App Purchases
A crossword with sums instead of words. Every run adds up to its clue and no digit repeats. Every board has one solution, and logic alone will find it.
Just Kakuro teaches you to play Kakuro properly, then gets out of the way.
Kakuro is a crossword with sums instead of words. Every run of white cells adds up to its clue, and no digit repeats inside a run. That is the whole rulebook. Getting good at it is another matter, and that is what this app is for.
Nine lessons take you from the rules to the techniques experienced solvers use without thinking: magic blocks, cross-referencing, min-max bounds, hidden singles, combination logic. Each one is a short board where the technique is the way through, rather than a page of text to read.
When you get stuck in a real game, the hint button names the technique that applies and shows you why it works. It will fill the cell in if you insist, but that is the last thing it offers rather than the first.
Practice drills let you rehearse one technique at a time. Mastery counts only the deductions you worked out yourself, so the progress path reflects what you can actually do.
Every puzzle has exactly one solution, and every puzzle can be finished by reasoning alone. The app proves both before a board ever reaches you. You are never asked to guess.
FREE
The rules lesson, No Repeats and Magic Blocks. Small and medium boards at every difficulty. An error check that tells you when something has gone wrong.
ONE PURCHASE UNLOCKS
Six more lessons. Every practice drill. The hints that teach instead of just answering. Large boards. Your stats and technique path.
No ads, no subscription, and none of the timers, energy or coins that puzzle apps tend to arrive with. Everything works offline.
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The developer, Kai Kunze, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kai Kunze
- Size
- 1.3 MB
- Category
- Puzzle
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 2.0 or later. - Apple TV
Requires tvOS 17.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Just Kakuro Full $4.99
- Copyright
- © 2026 Kai Kunze
