Slitherlink: Loop the Snake

In-app purchases
2.8K reviews
Content rating
Rated for 3+
100K+
Downloads
Content rating
Rated for 3+
Digital Purchases
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About this game

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 (tablet only)
• Track puzzle solving times
• Backup & restore puzzle progress to Google Drive

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.
Looping fence puzzles
Updated on
Apr 29, 2026
Available on
Android, Windows*
*Powered by Intel® technology

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    App info and performance
  • Data isn’t encrypted
  • You can request that data be deleted

Ratings and reviews

2.49K reviews
Maor W
May 25, 2026
I really like puzzle games and like this developer's content as well, there is much to solve even with just the free content, also try ejelta LLC's slitherlink as they also support inside and outside shading which is very helpful for huge and hard puzzles. this app has a more curated puzzle feel with very challenging puzzles as well as easy ones the teach you how to handle these puzzles well
3 people found this review helpful
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Conceptis Ltd.
June 1, 2026
Thank you for your feedback, and we will look into your suggestion of adding inside/outside shading.
A Google user
April 28, 2019
Fun puzzle game but there's something wrong with difficulty categories. It took me 7 min to solve a "very easy" puzzle, 2 min to solve a "medium" one and 4 min to solve a "hard" one. Not sure what they based the categories on but it clearly means nothing for me and the time it will take me to solve them. So, if you struggle with a "very easy" puzzle don't beat yourself up and try another.
26 people found this review helpful
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Eric Johnson
May 31, 2022
Takes a minute to get used to knowing when it'll automatically put in an x instead of a line where you tap, but after that, it's pretty easy to play! I love the number of free puzzles they give you. They have options to help you if you get stuck or made a mistake. They have free weekly puzzles, and when you run out of freebies, you can buy more puzzles for very cheap! The company that makes this also makes some very good puzzle magazines. Let's keep supporting them!
34 people found this review helpful
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What’s new

This version improves performance and stability.