# Alien Claw Pro vs googolChooChoo3D2

The clearest difference is price: googolChooChoo3D2 at Free against Alien Claw Pro's $0.99. googolChooChoo3D2 also leads on update cadence (monthly vs every 38 months). Alien Claw Pro's advantage is ads (none vs shown) and iOS requirement (13.0 vs 17.6). On in-app purchases and device support there is nothing between them.

googolChooChoo3D2 is free to download; Alien Claw Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Alien Claw Pro ships an update every 38 months, googolChooChoo3D2 monthly. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Alien Claw Pro | googolChooChoo3D2 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.0 (35 ratings)](https://appshunter.io/ios/app/googolchoochoo3d2/id1223923252/reviews)** |
| Number of ratings | — | **35** |
| Positive reviews | — | 76.9% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 38 months | **Monthly** |
| Monetization | — | Ad-supported |
| Size | 66 MB | 34 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Galatic Droids](https://appshunter.io/developer/806182439) | [Kouichi Hayashi](https://appshunter.io/developer/1809037541) |

## What reviewers say

### Alien Claw Pro

[App page](https://appshunter.io/ios/app/alien-claw-pro/id995983854)

**Features:** macOS Compatibility

**In-app purchases:** none


### googolChooChoo3D2

[App page](https://appshunter.io/ios/app/googolchoochoo3d2/id1223923252)

Design and build your own 3D model railroad layouts with customizable tracks, structures, and terrain. Experience your creations from various viewpoints, including the driver's seat of a running train.

**Highlights:** 3D model railroad simulation, Customizable track and structure placement, Terrain creation and editing, Multiple viewing perspectives, Automatic tunnel generation, Driver's seat view

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

**In-app purchases:** none


## Frequently asked questions

### Is Alien Claw Pro free?

Alien Claw Pro costs $0.99, with no in-app purchases.

### Is googolChooChoo3D2 free?

googolChooChoo3D2 is free to download, with no in-app purchases.

### Do Alien Claw Pro or googolChooChoo3D2 have ads?

googolChooChoo3D2 shows ads; Alien Claw Pro does not.

### Which is updated more often, Alien Claw Pro or googolChooChoo3D2?

Alien Claw Pro ships an update every 38 months, and googolChooChoo3D2 monthly. Most recently, Alien Claw Pro was updated on October 7, 2026 and googolChooChoo3D2 on October 24, 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.*