Comparison

Slitherlink vs Loopix

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

Head to head
About

Slitherlink

Solve logic puzzles by drawing a single loop around clues on a grid. Connect dots to form a continuous line, with no crossings or branches. Offers endless fun and intellectual challenge for puzzle enthusiasts.

Highlights
  • Draw a single continuous loop
  • Surround numbered clues
  • Pure logic, no math required
  • Weekly bonus puzzles
  • Multiple difficulty levels
  • Auto complete clues
  • Highlight link segment
Features
Read full description

Surround each clue with lines to form one single loop! Each puzzle consists of a rectangular lattice of dots with some clues in various places. The object is to connect the dots surrounding each clue so that the number of lines equals the value of the clue and the lines around all clues form one continuous loop with no crossings or branches. Empty squares may be surrounded by any number of lines. Slitherlink are addictive loop-forming puzzles which were invented in Japan. Using pure logic and requiring no math to solve, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages. The game features 2-finger tapping for quick zoom, auto complete clues setting and a link segment highlighting option to help to avoid creating separate loops. To help see the puzzle progress, graphic previews in the puzzle list show the progress of all puzzles in a volume as they are being solved. A Gallery view option provides these previews in a larger format. For more fun, Slitherlink contains no ads and includes a Weekly Bonus section providing an extra free puzzle each week. PUZZLE FEATURES • 200 free Slitherlink puzzles • Extra bonus puzzle published free each week • Multiple difficulty levels from very easy to extremely hard • Grid sizes up to 16x22 • Puzzle library continuously updates with new content • Manually selected, top quality puzzles • Unique solution for each puzzle • Hours of intellectual challenge and fun • Sharpens logic and improves cognitive skills GAMING FEATURES • No ads • Unlimited check puzzle • Unlimited Undo and Redo • Auto complete clues • Highlight link segment • Quick zoom using 2-finger tap • Concurrently playing and saving multiple puzzles • Puzzle filtering, sorting and archiving options • Dark Mode support • Graphic previews showing puzzles progress as they are being solved • Portrait and landscape screen support (iPad only) • Track puzzle solving times • Backup & restore puzzle progress to iCloud ABOUT Slitherlink have also become popular under other names such as Fences, Loop the Loop, Loopy, Suriza, Dotty Dilemma and Number Line. Similar to Sudoku, Kakuro and Hashi, the puzzles are solved using logic alone. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.conceptispuzzles.com/index.aspx?uri=info/doc/220

About

Loopix

Features
Read full description

Loopix is a calm loop logic puzzle. Connect the dots into one single, closed loop — guided only by the numbers. Each number tells you how many of its four sides the loop uses. There is no guessing: every puzzle has exactly one solution you can reach by pure logic. Simple to learn, deeply absorbing to master. QUIET BY DESIGN No flashy effects, no timers forcing you to hurry. Just you, the grid, and the satisfying moment a loop falls into place. WHAT'S INSIDE - 6,000+ puzzles, every one with a single unique solution - Four difficulties, from Easy to Expert - Three board sizes: 5x5, 7x7, 10x10 - A daily puzzle, the same for everyone, every day - Build and track your daily streak - Hints when you are stuck, one edge at a time - Light and dark themes - Fully playable offline — no connection needed, ever HOW TO PLAY Tap an edge to draw a line, tap again to mark an X, once more to clear. Drag to draw quickly. Make one continuous loop that satisfies every number, without crossing or branching. An interactive tutorial teaches you the core techniques in about a minute. From there, it is just you and the logic. Free to play.

Screenshots

Slitherlink4 screens
Loopix4 screens

Verdict

The call

The clearest difference is in-app purchases: Loopix at none against Slitherlink's 13. Loopix also leads on update cadence (every 2 days vs every 4 months) and iOS requirement (13.0 vs 15.6). On price, ads 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 13 one-off in-app purchases. Loopix asks for nothing beyond the download.

UpkeepUpdate frequency

Slitherlink ships an update every 4 months, Loopix every 2 days. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
Slitherlink versus Loopix: the parameters behind the verdict, then further details
ParameterSlitherlinkLoopix
PriceFreeFree
Rating4.8 (457 ratings) — better—
Positive reviews89.5% of reviews—
Number of ratings457 — better—
Update frequencyEvery 4 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size7 MB28 MB
Age rating4+4+
DeveloperConceptis Ltd.ShimaTech

Bugs and requests

Slitherlink

Reported bugs

3 issues
  • App not loading properly for some users
  • Freezing issues on login screen
  • Incompatibility with older devices

Requested features

5 requests
  • Add a dark mode option
  • Implement coloring/marking tools for loop segments
  • Provide more free puzzle content
  • Reduce pricing for puzzle packs
  • Add a rewind/undo feature to go back to previous puzzle states

Loopix

Not enough reviews yet to summarise bugs or requests.

In-app purchases

13 purchases

Slitherlink

One-time13
  • Medium Snacks 1$0.99
  • Easy Variety 1$1.99
  • Easy Variety - Large 1$1.99
Show 10 more
  • Medium Variety 1$1.99
  • Medium Variety - Large 1$1.99
  • Hard Variety 1$1.99
  • Easy Variety 2$1.99
  • Medium Variety 2$1.99
  • Hard Variety 2$1.99
  • Big & Easy 1$1.99
  • Big & Medium 1$1.99
  • Hard Variety - Large 1$1.99
  • Big & Tough 1$1.99
None

Loopix

No in-app purchases

Questions

Is Slitherlink free?
Slitherlink is free to download, with in-app purchases available.
Is Loopix free?
Loopix is free to download, with no in-app purchases.
Do Slitherlink or Loopix have ads?
Neither Slitherlink nor Loopix shows ads.
Which is updated more often, Slitherlink or Loopix?
Slitherlink ships an update every 4 months, and Loopix every 2 days. Most recently, Slitherlink was updated on October 10, 2026 and Loopix on October 9, 2026.

Other comparisons