# Zero Gravity 3D vs Alien Rescue

The clearest difference is in-app purchases: Zero Gravity 3D at none against Alien Rescue's 3. Zero Gravity 3D also leads on iOS requirement (10.0 vs 12.0). Alien Rescue's advantage is update cadence (every 5 months vs every 20 months). On price, ads and device support there is nothing between them.

Both are free to download. Alien Rescue sells 3 one-off in-app purchases. Zero Gravity 3D asks for nothing beyond the download.

Zero Gravity 3D ships an update every 20 months, Alien Rescue every 5 months. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Zero Gravity 3D | Alien Rescue |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 20 months | **Every 5 months** |
| Size | 83 MB | 220 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | +4 |
| Developer | [喜拉 任](https://appshunter.io/developer/1447216936) | [Basit Ali](https://appshunter.io/developer/1640692632) |

## What reviewers say

### Zero Gravity 3D

[App page](https://appshunter.io/ios/app/zero-gravity-3d/id1476355895)

**Features:** macOS Compatibility

**In-app purchases:** none


### Alien Rescue

[App page](https://appshunter.io/ios/app/alien-rescue-galaxy-shooter/id1642314912)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |
| Unlock Trucks | $10.99 | one-time |
| Unlock All Levels | $10.99 | one-time |


## Frequently asked questions

### Is Zero Gravity 3D free?

Zero Gravity 3D is free to download, with no in-app purchases.

### Is Alien Rescue free?

Alien Rescue is free to download, with in-app purchases available.

### Do Zero Gravity 3D or Alien Rescue have ads?

Both Zero Gravity 3D and Alien Rescue show ads.

### Which is updated more often, Zero Gravity 3D or Alien Rescue?

Zero Gravity 3D ships an update every 20 months, and Alien Rescue every 5 months. Most recently, Zero Gravity 3D was updated on October 14, 2026 and Alien Rescue 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.*