Comparison

Kurotto Extreme vs Slitherlink

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 350+ challenges across 7 difficulty levels
  • 7 new daily challenges
  • Autosave progress
  • No time limits
  • 2 global leaderboards
  • Full tutorial
Read full description

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

About

Slitherlink

Features
Read full description

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

Kurotto Extreme4 screens
Slitherlink4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Slitherlink sells 1 one-off in-app purchase. Kurotto Extreme asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Kurotto Extreme versus Slitherlink: the parameters behind the verdict, then further details
ParameterKurotto ExtremeSlitherlink
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 22 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size22 MB14 MB
Age rating4+4+
DeveloperChristophe BarangerDAN URBANEK

In-app purchases

None

Kurotto Extreme

No in-app purchases

1 purchases

Slitherlink

One-time1
  • Slitherlink Premium Unlock$3.00

Questions

Is Kurotto Extreme free?
Kurotto Extreme is free to download, with no in-app purchases.
Is Slitherlink free?
Slitherlink is free to download, with in-app purchases available.
Do Kurotto Extreme or Slitherlink have ads?
Kurotto Extreme shows ads; Slitherlink does not.
Which is updated more often, Kurotto Extreme or Slitherlink?
Kurotto Extreme ships an update every 22 months, and Slitherlink every 2 months. Most recently, Kurotto Extreme was updated on October 5, 2026 and Slitherlink on October 3, 2026.

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