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Sharpen your mind with a connect-the-block-style one-line brain training puzzle game. A simple but addictive one-line puzzle game that’s completely free to play. Your brain becomes more active the more you play. During your commute, before you sleep… enjoy downtime with brain training. The rules are extremely simple. Just fill in all of the blocks
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Inside the game.
Official screenshots supplied through Apple. Artwork belongs to the respective developer. View on theApp Store ↗
About Fill one-line puzzle game
Developer description, as provided in the original store listing.
Sharpen your mind with a connect-the-block-style one-line brain training puzzle game.
A simple but addictive one-line puzzle game that’s completely free to play.
Your brain becomes more active the more you play.
During your commute, before you sleep… enjoy downtime with brain training.
The rules are extremely simple.
Just fill in all of the blocks using only one line.
Use hints for puzzles that are too hard to solve.
Hints are also free, of course.
4 levels of difficulty.
A whopping 2,000 puzzles.
Don’t get too cozy—the puzzles get harder as you go along.
One-line puzzles are mathematical problems with origins in the early 18th century. First posed in Königsberg, the original puzzle revolved around the town’s Pregel River.
Mathematical thinking is said to increase work efficiency and prevent aging.
Whether math is your bane or your forte, be sure to give this game a try.
You’re sure to get hooked on these puzzles!
Good to know.
- Developer
- GAMINCAT, INC.
- Release date
- May 2, 2016
- Latest version
- 8.6.0
- Requires
- iOS 12.0 or later
- Price snapshot
- Free JPY
- Source checked
- Oct 23, 2026
Apple App Store lookup ↗ · Store ratings, prices, and availability can change. Check the App Store for your region.
A few quick answers.
Is Fill one-line puzzle game available on iPhone?
Fill one-line puzzle game is listed on the JP App Store. Availability varies by region and compatible device.
Is Fill one-line puzzle game free?
The recorded download price is free. In-app purchases, subscriptions, or additional content may cost extra. Source checked Oct 23, 2026.
How is the game’s social activity measured?
Good Game Daily compares available samples of recent game mentions with the preceding 24-hour window. Coverage and source failures are disclosed. Read the methodology.
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