Slitherlink Mastery

Slitherlink Mastery

loopy logic puzzle

13 ratings
5 reviews
Free
In-App PurchasesWith Ads

Details

Released
September 2, 2018
Updated
October 27, 2026

Features

Slitherlink Mastery video #1 for iPhone
Slitherlink Mastery screenshot #2 for iPhone
Slitherlink Mastery screenshot #3 for iPhone
Slitherlink Mastery screenshot #4 for iPhone
Slitherlink Mastery screenshot #5 for iPhone
Slitherlink Mastery screenshot #6 for iPhone
iphone
ipad
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About

This logic puzzle app offers a vast collection of challenges with adjustable difficulty and sizes. Enjoy a variety of themes, helpful tools like line coloring and error indicators, and track your progress with stats and high scores. An advanced difficulty mode is available via in-app purchase.

✓Multiple difficulty levels
✓Various puzzle sizes
✓Triangle, Square, and Hex puzzle types
✓Over 10,000 puzzles
✓Customizable themes
✓Touch-screen controls
✓Instant error indications
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What's New in Slitherlink Mastery

1.13

October 27, 2026

A small update. - Updated the in-app purchase system behind Mastery. Happy solving!

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Subscriptions & In-App Purchases

$5.99

Mastery Mode

Puzzle solve at most taxing difficulty

User reviews

My puzzle disappeared after I finished. 10+ hours of work gone

The first puzzle I ever did was a 20x20 pro hexagon grid. This was admittedly a mistake as I was a newb and mistakes were made, slowing down the process considerably. It took 10 hours, but I was really proud of myself for fixing all my mistakes and finishing. I didn’t realize the puzzle would just disappear once I was done, so I went to the main menu and now this thing that I spent 10+ hours on is just gone. This is incredibly upsetting. Honestly, I’m a software engineer and in not too much longer than the time it took, I could code my own slitherlink app, which makes the value of this one pretty low to me, definitely negative if I plan to use it to solve another large puzzle. I wish I had paid more attention to the rough corners before using this app.

Also bad for colorblind people. I’m colorblind and it really was impossible to tell red vs green numbers. I had to count the walls for each cell. Also errant touches would trigger false walls I didn’t mean to tap while I was planning around and there were a few puzzles that were ambiguous (more than 1 solution).
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Pretty good, could be great

A couple suggestions:

Add an option to automatically X out lines that should obviously be X’d (like when I put a line next to a 1, X out the rest of the edges.)

It’s hard to tell when the puzzle is scrolled out to the side sometimes, so I end up playing like I’m on the edge. Some indicator (some blurring?) showing were not at the edge would be nice.
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Nicely done

I was very impressed with this game. Zen like themes. Good range of challenges. No annoying ads! Happy to pay the 3$ to unlock all the levels. Thank you.

Hostile to color blind people

The game is really nice and clear. Except the color schemes are really difficult to read for color blind people.

Hard to see

Great game, wish they had different color scheme cause I’m color blind with the colors they use so it’s hard to tell which ones are wrong

Developer apps

FAQ

What is Slitherlink Mastery?

Slitherlink Mastery is a logic puzzle game inspired by the popular Nikoli creation. It offers a wide range of puzzles with adjustable difficulty and sizes, along with various themes and helpful gameplay features.

How many puzzles are available in Slitherlink Mastery?

The app features over 10,000 randomly selected puzzles, ensuring a vast and varied experience for players.

What difficulty levels and puzzle sizes does Slitherlink Mastery offer?

Slitherlink Mastery provides four difficulty levels: Easy, Medium, Hard, and Master. Puzzle sizes range from 3x3 up to 20x20, with triangle, square, and hex puzzle types available.

Can I unlock more content in Slitherlink Mastery?

Yes, a 'master' difficulty level can be unlocked through an in-app purchase, offering an even greater challenge for dedicated puzzle solvers.

Does Slitherlink Mastery have ads?

Yes, Slitherlink Mastery contains advertisements. Users can support the developer by unlocking the master difficulty mode.

What devices is Slitherlink Mastery compatible with?

Slitherlink Mastery is available for iPhone, iPad, and iPod, making it accessible on a range of Apple devices.

How often is Slitherlink Mastery updated?

The latest version of Slitherlink Mastery is 1.13, which was last updated on October 27, 2026. This indicates a recent update, suggesting ongoing support and development.

What is the age rating for Slitherlink Mastery?

Slitherlink Mastery has an age rating of 4+, making it suitable for a wide audience of players.