Kikko: Hex Sum Puzzle
Kakuro Logic Number Game
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Over 2000 boards, 15 chapters, day and night paper. One-off Supporter purchase: no ads at all. Works offline.
A hexagon board. One, two or three dots in each cell. Every line that carries an arrow must add up to the number on that arrow. When every arrow turns green, the board is solved.
That is the whole rule. The rest is bigger boards and the constraints that land on top of them.
— PLAY —
• 15 chapters, over 2000 generated boards
• No timer, no lives, no streak. Think as long as you like
• One tap to undo, one tap to clear
• A hint when you are stuck: it opens one cell's true value
— NEW CONSTRAINTS —
Later chapters add rules, and each one is taught on its own, on a calm board:
• Region sums — cells wrapped in a mizuhiki cord share a total
• Seals and bonds — cells tied to each other
— LOOK —
Washi paper and sumi ink. Each chapter has its own season colour. Night has its own paper: sumizome, not a darkened day but a separate world mixed from indigo.
The stones are go stones. Other stone sets are available in the market.
— QUIET —
The sound palette is koto plucks on the hirajoshi pentatonic, struck bells and dry wooden knocks. Nothing has a sharp attack. Playing it muted is part of the design too.
— NO INTERNET NEEDED —
Every board is on the device. Works on a plane, on the metro, out of coverage.
— SUPPORTER —
A one-time purchase: removes every ad and gives a purse of coins. Not a subscription, it does not repeat.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Fixed a problem where purchases were not being processed correctly.
Text throughout the game is much larger and easier to read.
Two fingers zoom the board in and out; one finger moves around it once zoomed.
French added.
How to Play is now two steps and ends on its own.
Boards that split into separate islands are drawn closer together, so the stones and their numbers are larger.
A reworked transition between screens, and a new app icon.
The developer, Fırat DINC, 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 Linked to You
The following data may be collected and linked to your identity:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Location
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Fırat DINC
- Size
- 120.1 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- 600 Coins $0.99
- 2000 Coins $2.99
- 60 Hints $2.99
- 20 Hints $0.99
- Supporter $4.99
- Copyright
- © 2026 Kikko