Kurotto Extreme vs Slitherlink
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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
Slitherlink
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Draw one clean loop with pure logic. Slitherlink is a classic line puzzle where number clues tell how many edges surround each cell. Connect the right edges, avoid branches, and close a single loop without guessing. HOW IT WORKS • Numbers show how many surrounding edges are part of the loop • The final line must be one continuous loop • No branches, crossings, or loose ends • Every puzzle is designed for a unique solution WHY YOU'LL KEEP PLAYING • 900 curated puzzles across Easy, Medium, and Hard • A fresh daily challenge with streak tracking • Guided practice and story rules for quick learning • Game Center leaderboards and achievements PLAY YOUR WAY • Full offline play • Home Screen widget for daily practice • Readable themes for light and dark play • VoiceOver-friendly labels, hints, and scalable text • Free to start, with premium content when you want more Perfect for fans of Sudoku, Hashi, Masyu, Nonogram, Minesweeper, and elegant deduction puzzles. Download Slitherlink and close your first loop.
Screenshots
Verdict
The clearest difference is in-app purchases: Kurotto Extreme at none against Slitherlink's 1. Kurotto Extreme also leads on iOS requirement (13.0 vs 18.0). Slitherlink's advantage is ads (none vs shown) and update cadence (every 2 months vs every 22 months). On price 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. Slitherlink sells 1 one-off in-app purchase. Kurotto Extreme asks for nothing beyond the download.
Kurotto Extreme ships an update every 22 months, Slitherlink every 2 months. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.
| Parameter | Kurotto Extreme | Slitherlink |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 22 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 22 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Christophe Baranger | DAN URBANEK |
In-app purchases
Kurotto Extreme
No in-app purchases
Slitherlink
- Slitherlink Premium Unlock$3.00
Questions
Is Kurotto Extreme free?
Is Slitherlink free?
Do Kurotto Extreme or Slitherlink have ads?
Which is updated more often, Kurotto Extreme or Slitherlink?
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