# Helix Protocol vs Galaxy Alien Space Attack

The clearest difference is in-app purchases: Galaxy Alien Space Attack at none against Helix Protocol's 7. Galaxy Alien Space Attack also leads on update cadence (daily vs every 3 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Helix Protocol sells 7 one-off in-app purchases. Galaxy Alien Space Attack asks for nothing beyond the download.

Helix Protocol ships an update every 3 weeks, Galaxy Alien Space Attack daily. The most recent releases landed on September 21, 2026 and August 2, 2026 respectively.

## The numbers

| Metric | Helix Protocol | Galaxy Alien Space Attack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 45 MB | 87 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Oleksii Poliakov](https://appshunter.io/developer/648955741) | [刚 曾](https://appshunter.io/developer/324816540) |

## What reviewers say

### Helix Protocol

[App page](https://appshunter.io/ios/app/helix-protocol/id936490163)

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50K Credits | $2.99 | one-time |
| 125K Credits | $5.99 | one-time |
| 175K Credits | $8.99 | one-time |
| 250K Credits | $12.99 | one-time |
| 500K Credits | $19.99 | one-time |
| 750K Credits | $24.99 | one-time |
| 1M Credits | $29.99 | one-time |


### 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


## Frequently asked questions

### Is Helix Protocol free?

Helix Protocol is free to download, with in-app purchases available.

### Is Galaxy Alien Space Attack free?

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

### Do Helix Protocol or Galaxy Alien Space Attack have ads?

Both Helix Protocol and Galaxy Alien Space Attack show ads.

### Which is updated more often, Helix Protocol or Galaxy Alien Space Attack?

Helix Protocol ships an update every 3 weeks, and Galaxy Alien Space Attack daily. Most recently, Helix Protocol was updated on September 21, 2026 and Galaxy Alien Space Attack on August 2, 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.*