# Zetta Force 7 vs Galaxy Invaders 2

The clearest difference is iOS requirement: Zetta Force 7 at 13.0 against Galaxy Invaders 2's 15.0. On price, update cadence, 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.

Zetta Force 7 ships an update every 27 months, Galaxy Invaders 2 every 32 months. The most recent releases landed on May 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Zetta Force 7 | Galaxy Invaders 2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 27 months** | Every 32 months |
| Size | 136 MB | 135 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Galatic Droids](https://appshunter.io/developer/806182439) | [Taiwei Chiu](https://appshunter.io/developer/1516738132) |

## What reviewers say

### Zetta Force 7

[App page](https://appshunter.io/ios/app/zetta-force-7/id1063742632)

**Features:** macOS Compatibility

**In-app purchases:** none


### Galaxy Invaders 2

[App page](https://appshunter.io/ios/app/galaxy-invaders-2/id1544638829)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zetta Force 7 free?

Zetta Force 7 is free to download, with no in-app purchases.

### Is Galaxy Invaders 2 free?

Galaxy Invaders 2 is free to download, with no in-app purchases.

### Do Zetta Force 7 or Galaxy Invaders 2 have ads?

Both Zetta Force 7 and Galaxy Invaders 2 show ads.

### Which is updated more often, Zetta Force 7 or Galaxy Invaders 2?

Zetta Force 7 ships an update every 27 months, and Galaxy Invaders 2 every 32 months. Most recently, Zetta Force 7 was updated on May 16, 2026 and Galaxy Invaders 2 on September 10, 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.*