# Slitherlink vs Petdoku!

Slitherlink and Petdoku! are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Slitherlink | Petdoku! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Weekly | Weekly |
| Size | 107 MB | 295 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [nineclove](https://appshunter.io/developer/305610030) | [DOUBLE8](https://appshunter.io/developer/1865045641) |

## What reviewers say

### Slitherlink

[App page](https://appshunter.io/ios/app/slitherlink-number-loop/id6759080379)

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

**In-app purchases:** none


### Petdoku!

[App page](https://appshunter.io/ios/app/petdoku/id6776118236)

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

**In-app purchases:** none


## Frequently asked questions

### Is Slitherlink free?

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

### Is Petdoku! free?

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

### Do Slitherlink or Petdoku! have ads?

Both Slitherlink and Petdoku! show ads.

### Which is updated more often, Slitherlink or Petdoku!?

Slitherlink ships an update weekly, and Petdoku! weekly. Most recently, Slitherlink was updated on October 15, 2026 and Petdoku! on October 13, 2026.

---

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