# Circrix vs Slitherlink

The clearest difference is in-app purchases: Circrix at none against Slitherlink's 1. Circrix also leads on update cadence (every 5 days vs every 3 weeks). Slitherlink's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Slitherlink sells 1 one-off in-app purchase. Circrix asks for nothing beyond the download.

Circrix ships an update every 5 days, Slitherlink every 3 weeks. The most recent releases landed on October 3, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Circrix | Slitherlink |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Size | 6 MB | 18 MB |
| Requires iOS | 18.1 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Onur BENLI](https://appshunter.io/developer/1893551487) | [DAN URBANEK](https://appshunter.io/developer/1875347262) |

## What reviewers say

### Circrix

[App page](https://appshunter.io/ios/app/circrix-logic-puzzle/id6762252289)

**Features:** macOS Compatibility

**In-app purchases:** none


### Slitherlink

[App page](https://appshunter.io/ios/app/slitherlink-loop-puzzle/id6765857599)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Slitherlink Premium Unlock | $3.00 | one-time |


## Frequently asked questions

### Is Circrix free?

Circrix is free to download, with no in-app purchases.

### Is Slitherlink free?

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

### Do Circrix or Slitherlink have ads?

Circrix shows ads; Slitherlink does not.

### Which is updated more often, Circrix or Slitherlink?

Circrix ships an update every 5 days, and Slitherlink every 3 weeks. Most recently, Circrix was updated on October 3, 2026 and Slitherlink on October 17, 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.*