# Doolhof vs Rock Zapper

The clearest difference is update cadence: Rock Zapper at every 2 months against Doolhof's every 14 months. Doolhof's advantage is device support (5 vs 3) and iOS requirement (13.0 vs 15.0). On price, ads and in-app purchases there is nothing between them.

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

Doolhof ships an update every 14 months, Rock Zapper every 2 months. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Doolhof | Rock Zapper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 months** |
| Size | 3 MB | 36 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jan Nutbroek](https://appshunter.io/developer/887410817) | [Kang Engineering Systems LLC](https://appshunter.io/developer/1506663175) |

## What reviewers say

### Doolhof

[App page](https://appshunter.io/ios/app/doolhof/id1529664582)

**In-app purchases:** none


### Rock Zapper

[App page](https://appshunter.io/ios/app/rock-zapper/id6772417015)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Doolhof free?

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

### Is Rock Zapper free?

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

### Do Doolhof or Rock Zapper have ads?

Neither Doolhof nor Rock Zapper shows ads.

### Which is updated more often, Doolhof or Rock Zapper?

Doolhof ships an update every 14 months, and Rock Zapper every 2 months. Most recently, Doolhof was updated on September 30, 2026 and Rock Zapper on October 6, 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.*