# Galaxy Alien Space Attack vs Sky Guardian

The clearest difference is update cadence: Galaxy Alien Space Attack at daily against Sky Guardian's every 3 days. Galaxy Alien Space Attack also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Galaxy Alien Space Attack ships an update daily, Sky Guardian every 3 days. The most recent releases landed on September 26, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Galaxy Alien Space Attack | Sky Guardian |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 3 days |
| Size | 87 MB | 52 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [刚 曾](https://appshunter.io/developer/324816540) | [EMRE OZEL](https://appshunter.io/developer/6806816615) |

## What reviewers say

### Galaxy Alien Space Attack

[App page](https://appshunter.io/ios/app/galaxy-alien-space-attack/id6790705228)

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

**In-app purchases:** none


### Sky Guardian

[App page](https://appshunter.io/ios/app/sky-guardian-bullet-hell/id6806816613)

**In-app purchases:** none


## Frequently asked questions

### Is Galaxy Alien Space Attack free?

Galaxy Alien Space Attack is free to download, with no in-app purchases.

### Is Sky Guardian free?

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

### Do Galaxy Alien Space Attack or Sky Guardian have ads?

Both Galaxy Alien Space Attack and Sky Guardian show ads.

### Which is updated more often, Galaxy Alien Space Attack or Sky Guardian?

Galaxy Alien Space Attack ships an update daily, and Sky Guardian every 3 days. Most recently, Galaxy Alien Space Attack was updated on September 26, 2026 and Sky Guardian on October 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.*