# AI Chat Assistant vs Hollow Zero

The clearest difference is device support: AI Chat Assistant at 4 against Hollow Zero's 2. On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. AI Chat Assistant sells 2 in-app purchases, starting at $5.99 per 7 days and Hollow Zero sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | AI Chat Assistant | Hollow Zero |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 58 MB | 22 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [DEVSRANK](https://appshunter.io/developer/1716669578) | [Geronti Liparteliani](https://appshunter.io/developer/1886274741) |

## What reviewers say

### AI Chat Assistant

[App page](https://appshunter.io/ios/app/ai-chat-assistant-replyo/id6740520360)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chatbot Weekly | $5.99 | per 7 days |
| Chatbot Yearly | $29.99 | per year |


### Hollow Zero

[App page](https://appshunter.io/ios/app/hollow-zero/id6761696293)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hollow Premium Monthly | $12.99 | per month |
| Hollow Premium Yearly | $99.99 | per year |


## Frequently asked questions

### Is AI Chat Assistant free?

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

### Is Hollow Zero free?

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

### Do AI Chat Assistant or Hollow Zero have ads?

Neither AI Chat Assistant nor Hollow Zero shows 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.*