# Prompt engineering vs Zero

The clearest difference is ads: Zero at none against Prompt engineering's shown. Prompt engineering's advantage is iOS requirement (13.0 vs 16.6). On price, 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.

## The numbers

| Metric | Prompt engineering | Zero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/prompt-engineering-ai-guide/id6762752388/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Size | 29 MB | 77 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Samir Patel](https://appshunter.io/developer/1793485427) | [jahanzaib Hameed](https://appshunter.io/developer/6801138709) |

## What reviewers say

### Prompt engineering

[App page](https://appshunter.io/ios/app/prompt-engineering-ai-guide/id6762752388)

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

**In-app purchases:** none


### Zero

[App page](https://appshunter.io/ios/app/zero-ai-detector-and-humanizer/id6811045894)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prompt engineering free?

Prompt engineering is free to download, with no in-app purchases.

### Is Zero free?

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

### Do Prompt engineering or Zero have ads?

Prompt engineering shows ads; 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.*