# Perimeter Zero vs Sky Shield

The clearest difference is iOS requirement: Perimeter Zero at 16.0 against Sky Shield's 26.2. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Perimeter Zero sells 1 one-off in-app purchase and Sky Shield sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Perimeter Zero | Sky Shield |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 days | — |
| Size | 11 MB | 16 MB |
| Requires iOS | **16.0** | 26.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 9+ | 12+ |
| Developer | [Hyacinthe Loua](https://appshunter.io/developer/6777148473) | [Andre Grillo](https://appshunter.io/developer/1847194422) |

## What reviewers say

### Perimeter Zero

[App page](https://appshunter.io/ios/app/perimeter-zero/id6786819667)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PerimeterZero Premium | $2.99 | one-time |


### Sky Shield

[App page](https://appshunter.io/ios/app/sky-shield-missile-defense/id6791145364)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Perimeter Zero free?

Perimeter Zero is free to download, with in-app purchases available.

### Is Sky Shield free?

Sky Shield is free to download, with in-app purchases available.

### Do Perimeter Zero or Sky Shield have ads?

Both Perimeter Zero and Sky Shield show ads.

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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.*