Slitherlink vs Piczle Lines DX
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- 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
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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
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.
- Connect dots to create pictures
- Extensive puzzle mode
- Gripping story mode
- Unlockable puzzles
- Puzzle bundles available
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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
Verdict
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
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.
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.
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.
| Parameter | Slitherlink | Piczle Lines DX |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (461 ratings) — better | 4.8 (91 ratings) |
| Positive reviews | 89.5% of reviews — better | 83.7% of reviews |
| Number of ratings | 461 — better | 91 |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 8.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 252 MB |
| Age rating | 4+ | 4+ |
| Developer | Conceptis Ltd. | Score Studios |
Customer experience
Slitherlink
Piczle Lines DX
User reviews
Slitherlink
From 461 App Store ratingsWhat 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 ratingsWhat 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
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- Hint button
- 3D version of Piczle Lines
In-app purchases
Slitherlink
- Medium Snacks 1$0.99
- Easy Variety 1$1.99
- Easy Variety - Large 1$1.99
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- 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
Piczle Lines DX
- Story Mode Bundle$0.99
- Grab Bag Bundle$0.99
- Culture Bundle$1.99
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- 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









