Fill One Line vs Kurotto Extreme
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Fill One Line
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FILL EVERYTHING WITH ONE LINE Start drawing a path from the initial mark that is highlighted and link all dots. Just fill in all of the blocks below the board. HUNDREDS OF LOGIC PUZZLES Choose the best path to fill all blank cells to win. Easy and fun to playing a puzzle with easy rules and interesting levels. IMPROVE YOUR LOGIC AND MIND You can't overlap any places you already filled, fill a puzzle in one row, can you occupy all blocks in single row ? RELAXING MUSIC AND COLORS Enjoy this brain training gamers who like to solve different shape gaming challenges. Simple and classic gameplay and exercise your brain now! FOUR DIFFERENT GAME MODES Appealing brain teaser string puzzle levels to help you practice your puzzle solving skills. DIFFICULTY FROM EASY YO HARD Various difficult modes in which you can challenge the linking points, shapes and sizes of puzzles. SLIDE YOUR FINDER TO DRAW THE LINE At first, it starts off with simple shapes, but each time your levels with 3 package sizes 5x7, 6x8, 7x9. VARIOUS COLOR THEMES AVAILABLE The gameplay ranges with multiple colors and innovative layout.
Kurotto Extreme
A logic puzzle game originating from Japan with simple rules for hours of engaging challenges. Fill empty cells based on numbered circles indicating continuous black cells, with no time limits and autosave functionality.
- 350+ challenges across 7 difficulty levels
- 7 new daily challenges
- Autosave progress
- No time limits
- 2 global leaderboards
- Full tutorial
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This game originated in Japan. The rules are really simple so you could enjoy hours of challenges, from easy to complex difficulty. Fill in some of the empty cells with the following rules: 1. The number in a circle indicates the total number of continuous black cells extending from it, vertically and horizontally. 2. Dragon circles may have any number of black cells around them. 3. Cells with circles cannot be colored. This game includes: + 350 challenges across 7 levels of difficulty. + 7 new daily challenges (1 per level of difficulty) + Autosave of your progress solving a grid so you could pause and resume as you wish. + No time limits to complete a challenge + 2 global leaderboards + Full Tutorial + and many more capabilities
Screenshots
Verdict
The clearest difference is update cadence: Fill One Line at every 9 months against Kurotto Extreme's every 22 months. Fill One Line also leads on iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fill One Line ships an update every 9 months, Kurotto Extreme every 22 months. The most recent releases landed on October 20, 2026 and October 5, 2026 respectively.
| Parameter | Fill One Line | Kurotto Extreme |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 9 months — better | Every 22 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 63 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | HECTOR GAUCHIA SAFONT | Christophe Baranger |
In-app purchases
Fill One Line
No in-app purchases
Kurotto Extreme
No in-app purchases
Questions
Is Fill One Line free?
Is Kurotto Extreme free?
Do Fill One Line or Kurotto Extreme have ads?
Which is updated more often, Fill One Line or Kurotto Extreme?
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