# Onyx vs Zero Chat

The clearest difference is in-app purchases: Onyx at none against Zero Chat's 1. Zero Chat's advantage is ads (none vs shown) and iOS requirement (16.4 vs 18.0). On price and device support there is nothing between them.

Both are free to download. Zero Chat sells 1 in-app purchase, starting at $8.99 per month. Onyx asks for nothing beyond the download.

## The numbers

| Metric | Onyx | Zero Chat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Every 4 days |
| Size | 29 MB | 118 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [David Azancot](https://appshunter.io/developer/507868249) | [Oleg Filimonov](https://appshunter.io/developer/1769783383) |

## What reviewers say

### Onyx

[App page](https://appshunter.io/ios/app/onyx-private-ai-chat/id6770044762)

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

**In-app purchases:** none


### Zero Chat

[App page](https://appshunter.io/ios/app/zero-chat-models/id6774957019)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $8.99 | per month |


## Frequently asked questions

### Is Onyx free?

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

### Is Zero Chat free?

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

### Do Onyx or Zero Chat have ads?

Onyx shows ads; Zero Chat 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.*