# Slitherlink vs Nonograms 999

The clearest difference is ads: Slitherlink at none against Nonograms 999's shown. Slitherlink also leads on review sentiment (89% vs 81%). Nonograms 999's advantage is update cadence (every 2 months vs every 4 months) and ratings volume (2.8K vs 461). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Slitherlink sells 13 one-off in-app purchases and Nonograms 999 sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Slitherlink holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Nonograms 999 has 2.8K ratings behind it against 461, so its average is the more settled of the two. Written reviews point the same way: 89% of Slitherlink's written reviews are positive against 81% of Nonograms 999's.

Slitherlink ships an update every 4 months, Nonograms 999 every 2 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Slitherlink | Nonograms 999 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (461 ratings)](https://appshunter.io/ios/app/slitherlink-loop-the-snake/id605918324/reviews)** | [4.6 (2.8K ratings)](https://appshunter.io/ios/app/nonograms-999/id1172964810/reviews) |
| Number of ratings | 461 | **2.8K** |
| Positive reviews | **89.5% of reviews** | 81.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 7 MB | 27 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Conceptis Ltd.](https://appshunter.io/developer/479420055) | [Seventh rank Inc.](https://appshunter.io/developer/408148416) |

## What reviewers say

### Slitherlink

[App page](https://appshunter.io/ios/app/slitherlink-loop-the-snake/id605918324)

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:** Family Sharing, Vision Pro support

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Medium Snacks 1 | $0.99 | one-time |
| Easy Variety 1 | $1.99 | one-time |
| Easy Variety - Large 1 | $1.99 | one-time |
| Medium Variety 1 | $1.99 | one-time |
| Medium Variety - Large 1 | $1.99 | one-time |
| Hard Variety 1 | $1.99 | one-time |
| Easy Variety 2 | $1.99 | one-time |
| Medium Variety 2 | $1.99 | one-time |
| Hard Variety 2 | $1.99 | one-time |
| Big & Easy 1 | $1.99 | one-time |
| Big & Medium 1 | $1.99 | one-time |
| Hard Variety - Large 1 | $1.99 | one-time |
| Big & Tough 1 | $1.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

- 🔍 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

**Reported bugs**

- App not loading properly for some users
- Freezing issues on login screen
- Incompatibility with older devices

**Requested features**

- 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


### Nonograms 999

[App page](https://appshunter.io/ios/app/nonograms-999/id1172964810)

Engage your mind with a vast collection of free logic puzzles. Enjoy a smooth, one-handed gameplay experience with intuitive controls, auto-save, and helpful tools like auto-fill and undo/redo. Discover a variety of handmade illustrations across different canvas sizes.

**Highlights:** 999 free logic puzzles, One-handed gameplay design, Auto-save progress, Auto-fill function, Undo/Redo functionality, Handmade challenges, Multiple canvas sizes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Hint Coin | $0.99 | one-time |
| 45 Hint Coin | $2.99 | one-time |
| 100 Hint Coin | $5.99 | one-time |
| 200 Hint Coin | $9.99 | one-time |

**What reviewers like**

- 🚀 Addictive and engaging
- 👍 Intuitive controls and UI
- 💡 Variety of puzzle sizes and difficulties
- 🚀 Frequent updates with new puzzles
- 👍 Minimal ads, non-intrusive

**What reviewers complain about**

- 🐛 Freezing and crashing issues
- 🔋 High battery consumption
- 🔒 No option to remove ads
- 🐛 Progress reset after updates
- 👎 Difficulty scaling on smaller screens

**Reported bugs**

- Freezing and crashing
- Puzzle progress not saving
- Incorrect puzzle clues/solutions

**Requested features**

- Dark mode option
- Cross-device progress sync
- More 30x30 and larger puzzles
- Option to purchase ad-free version
- Ability to mark 'unsure' squares


## Frequently asked questions

### Is Slitherlink free?

Slitherlink is free to download, with in-app purchases available.

### Is Nonograms 999 free?

Nonograms 999 is free to download, with in-app purchases available.

### Which has better reviews, Slitherlink or Nonograms 999?

Slitherlink is rated higher. Slitherlink averages 4.8 out of 5 from 461 ratings, while Nonograms 999 averages 4.6 from 2.8K ratings.

### Do Slitherlink or Nonograms 999 have ads?

Nonograms 999 shows ads; Slitherlink does not.

### Which is updated more often, Slitherlink or Nonograms 999?

Slitherlink ships an update every 4 months, and Nonograms 999 every 2 months. Most recently, Slitherlink was updated on October 26, 2026 and Nonograms 999 on October 26, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*