# Nonograms Katana vs Slitherlink JAM

The clearest difference is update cadence: Nonograms Katana at every 3 months against Slitherlink JAM's every 113 months. Nonograms Katana also leads on ratings volume (6.8K vs 8) and rating (4.8 vs 4.5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Nonograms Katana sells 3 one-off in-app purchases and Slitherlink JAM sells 12 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Nonograms Katana holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Nonograms Katana has 6.8K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 83% of Nonograms Katana's written reviews are positive against 63% of Slitherlink JAM's.

Nonograms Katana ships an update every 3 months, Slitherlink JAM every 113 months. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Nonograms Katana | Slitherlink JAM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (6.8K ratings)](https://appshunter.io/ios/app/nonograms-katana/id1037710023/reviews)** | [4.5 (8 ratings)](https://appshunter.io/ios/app/slitherlink-jam/id1185633152/reviews) |
| Number of ratings | **6.8K** | 8 |
| Positive reviews | **82.9% of reviews** | 62.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 113 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 27 MB | 4 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Ucdevs Interaction DOO](https://appshunter.io/developer/1037710022) | [J&M Rapid Application Development, LLC.](https://appshunter.io/developer/1035996947) |

## What reviewers say

### Nonograms Katana

[App page](https://appshunter.io/ios/app/nonograms-katana/id1037710023)

Engage in logic puzzles where you fill cells based on numerical clues to reveal hidden pictures. This app offers a vast collection of puzzles, tools for marking cells, and options to create and share your own challenges.

**Highlights:** 1001 nonogram puzzles, Create and share custom puzzles, Black-and-white and colored puzzles, Puzzles sorted by size, Hints and undo/redo functionality, Cloud save and achievements

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 80 Hints | $0.99 | one-time |
| 200 Hints | $1.99 | one-time |
| VIP version | $2.99 | one-time |

**What reviewers like**

- 👍 Lots of puzzles
- 👍 Customizable settings
- 👍 Minimal ads
- 👍 Challenging puzzles
- 👍 User-created puzzles

**What reviewers complain about**

- 🐛 Occasional crashes
- 🐛 Puzzle progress loss
- 🐛 Ads not working
- 🐛 Freezing issues
- 🐛 Compatibility problems

**Reported bugs**

- Puzzle progress not saving
- Puzzle images not loading
- Freezing/crashing on larger puzzles
- Ads not playing properly
- Compatibility issues with newer iOS versions

**Requested features**

- Dark mode option
- Ability to rearrange/move puzzle pieces
- Difficulty ratings for puzzles
- Automatic line/row completion
- Ability to follow/subscribe to users


### Slitherlink JAM

[App page](https://appshunter.io/ios/app/slitherlink-jam/id1185633152)

A logic puzzle game where you draw a single, unbroken loop around a grid of numbers. Each number indicates the number of surrounding walls. Offers infinite puzzles, helpful tools, and leaderboards.

**Highlights:** Infinite free puzzles, Logic-based gameplay, Tutorial and hints, Undo and 'healing' feature, Leaderboards and achievements, Automatic wall removal options

**Features:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Auto Remove Corner's Extra Sides | $0.99 | one-time |
| Auto Remove extras from 0's | $0.99 | one-time |
| Envelope of 10 Hints | $0.99 | one-time |
| Auto-remove from 1's, 2's, & 3's | $1.99 | one-time |
| Handful of 25 Hints | $1.99 | one-time |
| Shoebox of 40 Hints | $2.99 | one-time |
| Armful of 75 Hints | $4.99 | one-time |
| Crate of 100 Hints | $5.99 | one-time |
| Truck load of 250 Hints | $9.99 | one-time |
| Train car full of 1000 Hints | $19.99 | one-time |
| A Boat-load of 10,000 Hints | $49.99 | one-time |
| A Galaxy of Unlimited Hints | $99.99 | one-time |


## Frequently asked questions

### Is Nonograms Katana free?

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

### Is Slitherlink JAM free?

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

### Which has better reviews, Nonograms Katana or Slitherlink JAM?

Nonograms Katana is rated higher. Nonograms Katana averages 4.8 out of 5 from 6.8K ratings, while Slitherlink JAM averages 4.5 from 8 ratings.

### Do Nonograms Katana or Slitherlink JAM have ads?

Neither Nonograms Katana nor Slitherlink JAM shows ads.

### Which is updated more often, Nonograms Katana or Slitherlink JAM?

Nonograms Katana ships an update every 3 months, and Slitherlink JAM every 113 months. Most recently, Nonograms Katana was updated on October 29, 2026 and Slitherlink JAM on October 8, 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.*