# Slitherlink Mastery > Logic puzzle game with multiple difficulty levels, grid sizes, and puzzle types. (iPhone/iPad app by Camilo Fitzgerald.) - Source: https://appshunter.io/ios/app/slitherlink-mastery/id1434231923 (this page in markdown: same URL + `.md`) - Developer: [Camilo Fitzgerald](https://appshunter.io/developer/1434231922) - Category: Games - Price: Free with in-app purchases - Rating: 4.38/5 from 13 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 81 MB - Languages: English - Released: 2018-09-02 - Data updated: 2026-07-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/slitherlink-mastery/id1434231923/reviews.md ## What is Slitherlink Mastery? Slitherlink is an addictive logic puzzle created in Japan by Nikoli, the creator of Sudoko. We have been addicted to Slitherlink for over 10 years now and decided it's about time to release an app of our own. Enjoy! FEATURES • 4 difficulty levels: Easy, Medium, Hard and Master • 5 puzzle sizes: 3x3, 7x7, 10x10, 15x15 and 20x20 • 3 types of puzzles: Triangle, Square, Hex • Over 10,000 randomly selected puzzles • 6+ themes to suite your mood and taste • Touch-screen pan and zooming • Line colouring for long chains • Double tap to mark empty spaces • Undo, redo, reset and replay buttons • Instant error indications • Stats and high scores system A 'master' difficulty can be unlocked with an in-app-purchase for the most hardcore of puzzle solvers. If you're enjoying Slitherlink Mastery you can support us by unlocking this mode. Enjoy! ## Key features - Multiple difficulty levels - Various puzzle sizes - Triangle, Square, and Hex puzzle types - Over 10,000 puzzles - Touch-screen pan and zoom - Instant error indications - Stats and high scores ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Mastery Mode | $5.99 | one-time | ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/slitherlink-mastery/id1434231923/reviews.md ### 1/5 — My puzzle disappeared after I finished. 10+ hours of work gone *2020-12-16* The first puzzle I ever did was a 20x20 pro hexagon grid. This was admittedly a mistake as I was a newb and mistakes were made, slowing down the process considerably. It took 10 hours, but I was really proud of myself for fixing all my mistakes and finishing. I didn’t realize the puzzle would just disappear once I was done, so I went to the main menu and now this thing that I spent 10+ hours on is just gone. This is incredibly upsetting. Honestly, I’m a software engineer and in not too much longer than the time it took, I could code my own slitherlink app, which makes the value of this one pretty low to me, definitely negative if I plan to use it to solve another large puzzle. I wish I had paid more attention to the rough corners before using this app. Also bad for colorblind people. I’m colorblind and it really was impossible to tell red vs green numbers. I had to count the walls for each cell. Also errant touches would trigger false walls I didn’t mean to tap while I was planning around and there were a few puzzles that were ambiguous (more than 1 solution). ### 4/5 — Pretty good, could be great *2020-06-08* A couple suggestions: Add an option to automatically X out lines that should obviously be X’d (like when I put a line next to a 1, X out the rest of the edges.) It’s hard to tell when the puzzle is scrolled out to the side sometimes, so I end up playing like I’m on the edge. Some indicator (some blurring?) showing were not at the edge would be nice. ### 5/5 — Nicely done *2020-05-27* I was very impressed with this game. Zen like themes. Good range of challenges. No annoying ads! Happy to pay the 3$ to unlock all the levels. Thank you. ### 4/5 — Hostile to color blind people *2019-10-19* The game is really nice and clear. Except the color schemes are really difficult to read for color blind people. ### 4/5 — Hard to see *2018-10-18* 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 ## Frequently asked questions about Slitherlink Mastery ### What is Slitherlink Mastery? Slitherlink Mastery is a logic puzzle game inspired by the popular Japanese puzzle created by Nikoli. It offers a wide range of puzzles with varying difficulties and sizes for players to enjoy. ### What are the difficulty levels in Slitherlink Mastery? Slitherlink Mastery features four difficulty levels: Easy, Medium, Hard, and Master. The Master difficulty can be unlocked via an in-app purchase for a more challenging experience. ### What puzzle sizes are available in Slitherlink Mastery? The app offers five puzzle sizes to cater to different preferences: 3x3, 7x7, 10x10, 15x15, and 20x20 grids. ### Does Slitherlink Mastery have ads? The provided data does not specify if Slitherlink Mastery contains advertisements. However, it is available for free and offers an in-app purchase for additional content. ### What types of puzzles can I play in Slitherlink Mastery? Slitherlink Mastery includes three types of puzzles: Triangle, Square, and Hex. This variety ensures a fresh experience for puzzle solvers. ### How many puzzles are included in Slitherlink Mastery? Slitherlink Mastery boasts over 10,000 randomly selected puzzles, ensuring a vast amount of content for players to engage with. ### What are the controls like in Slitherlink Mastery? The game features intuitive touch-screen controls, including pan and zooming capabilities. It also offers specific actions like double-tapping to mark empty spaces. ### Is Slitherlink Mastery suitable for children? Slitherlink Mastery has an age rating of 4+, making it suitable for younger players. The game focuses on logic and problem-solving skills. ## Version history (last 2 releases) ### 1.6 — 2026-06-03 - Art tweaks to board - Optimised for even low battery usage - Optimised input controls ### 1.5 — 2026-06-03 Remastered for 2026! ## More apps by Camilo Fitzgerald - [Zip Remastered](https://appshunter.io/ios/app/zip-remastered/id6776637997) All apps by Camilo Fitzgerald: https://appshunter.io/developer/1434231922 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-05.*