Comparison

Slitherlink vs Piczle Lines DX

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

Piczle Lines DX

Engage in addictive logic puzzles by connecting dots to create pictures. This game offers a vast puzzle mode and a compelling story mode for hours of entertainment.

Highlights
  • Connect dots to create pictures
  • Extensive puzzle mode
  • Gripping story mode
  • Unlockable puzzles
  • Puzzle bundles available
Features
Read full description

The follow-up to the highly praised prequel Piczle Lines DX offers hours of addictive, mind-bending logic-puzzle fun! Create pictures (PICture puzZLE) by connecting the right dots. With an ever-expanding puzzle mode, as well as a gripping story mode Piczle Lines DX will keep you entertained for hours and hours! Piczle Lines DX is absolutely free, with 60 puzzles for your enjoyment, an extra 20 if you can find the secret to unlocking them and a variety of paid-for and free puzzles bundles available in the in-game store for those who want more!

Screenshots

Slitherlink4 screens
Piczle Lines DX4 screens

Verdict

The call

The clearest difference is update cadence: Piczle Lines DX at every 3 weeks against Slitherlink's every 4 months. Piczle Lines DX also leads on iOS requirement (8.0 vs 15.6). Slitherlink's advantage is ratings volume (461 vs 91). On price, rating, review sentiment and ads 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 and Piczle Lines DX sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Slitherlink against 4.8 for Piczle Lines DX. That said, the two scores are not equally well evidenced: Slitherlink has 461 ratings behind it against 91, so its average is the more settled of the two. Written reviews are what separate them: 89% of Slitherlink's written reviews are positive against 84% of Piczle Lines DX's.

UpkeepUpdate frequency

Slitherlink ships an update every 4 months, Piczle Lines DX every 3 weeks. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Slitherlink versus Piczle Lines DX: the parameters behind the verdict, then further details
ParameterSlitherlinkPiczle Lines DX
PriceFreeFree
Rating4.8 (461 ratings) — better4.8 (91 ratings)
Positive reviews89.5% of reviews — better83.7% of reviews
Number of ratings461 — better91
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.68.0 — better
Further details — not scored
Size7 MB252 MB
Age rating4+4+
DeveloperConceptis Ltd.Score Studios

Customer experience

Slitherlink

All ratings457 ratings
Positive96.5%
Neutral2.2%
Negative1.3%
Written reviews171 reviews
Positive89.5%
Neutral7.6%
Negative2.9%

Piczle Lines DX

All ratings91 ratings
Positive96.7%
Neutral0.0%
Negative3.3%
Written reviews49 reviews
Positive83.7%
Neutral12.2%
Negative4.1%

User reviews

Slitherlink

From 461 App Store ratings

What we love

  • 🎉 Challenging and fun puzzles
  • 👍 Well-designed and intuitive interface
  • 🔍 Helpful check and undo features
  • 💡 Variety of puzzle sizes and difficulty levels
  • 🧠 Requires logical thinking

Room to improve

  • 🔍 Lack of coloring/marking tools to differentiate loop segments
  • 💰 Expensive puzzle pack prices
  • 🌙 No dark mode option
  • 🐛 Occasional bugs and crashes
  • 🔍 Limited free puzzle content

Piczle Lines DX

From 91 App Store ratings

What we love

  • 😍 Addictive and fun gameplay
  • 👍 Intuitive and easy to learn
  • ✨ Beautiful art and animations
  • 🆓 Plenty of free content
  • 😌 Relaxing and good for passing time

Room to improve

  • 🤔 Some shades of gray hard to distinguish
  • ⏳ Intra-level animations can be long
  • 🔋 Battery drainer
  • 📱 Lacks iPhone X resolution support
  • 🐌 Puzzles can take a long time

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

Piczle Lines DX

Reported bugs

4 issues
  • Game doesn't register puzzle completion in story mode
  • Cannot purchase Story Mode pack due to sign-in issue
  • Too many bugs, keeps kicking out and not saving
  • Freezes when trying to reopen completed puzzle

Requested features

7 requests
  • More packs with 128x128 and 256x256 puzzle sizes
  • More games on mobile and PC from this developer
  • Ability to skip short 'materialize' cutscenes in story mode
  • Reduce screen size to see more number dots
  • Game data sync across devices
Show 2 more
  • Hint button
  • 3D version of Piczle Lines

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
9 purchases

Piczle Lines DX

One-time9
  • Story Mode Bundle$0.99
  • Grab Bag Bundle$0.99
  • Culture Bundle$1.99
Show 6 more
  • Empty Spaces$1.99
  • Fantasy Bundle$1.99
  • Culture Bundle 2$1.99
  • Culture Bundle 3$1.99
  • Humongous Bundle$2.99
  • Genius Bundle$2.99

Questions

Is Slitherlink free?
Slitherlink is free to download, with in-app purchases available.
Is Piczle Lines DX free?
Piczle Lines DX is free to download, with in-app purchases available.
Which has better reviews, Slitherlink or Piczle Lines DX?
Slitherlink is rated higher. Slitherlink averages 4.8 out of 5 from 461 ratings, while Piczle Lines DX averages 4.8 from 91 ratings.
Do Slitherlink or Piczle Lines DX have ads?
Neither Slitherlink nor Piczle Lines DX shows ads.
Which is updated more often, Slitherlink or Piczle Lines DX?
Slitherlink ships an update every 4 months, and Piczle Lines DX every 3 weeks. Most recently, Slitherlink was updated on October 29, 2026 and Piczle Lines DX on October 24, 2026.

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