# ISUD Zero vs Sky Guardian

The clearest difference is ads: ISUD Zero at none against Sky Guardian's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | ISUD Zero | Sky Guardian |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 3 days |
| Size | 119 MB | 52 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Suwitcha Sugthana](https://appshunter.io/developer/372726303) | [EMRE OZEL](https://appshunter.io/developer/6806816615) |

## What reviewers say

### ISUD Zero

[App page](https://appshunter.io/ios/app/isud-zero/id6765926399)

**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 ISUD Zero free?

ISUD Zero 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 ISUD Zero or Sky Guardian have ads?

Sky Guardian shows ads; ISUD Zero does not.

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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.*