# Rex Voice vs AI Chat Assistant

The clearest difference is ads: Rex Voice at none against AI Chat Assistant's shown. Rex Voice also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Rex Voice sells 3 one-off in-app purchases and AI Chat Assistant sells 10 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Rex Voice ships an update every 10 days, AI Chat Assistant weekly. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Rex Voice | AI Chat Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (756 ratings)](https://appshunter.io/ios/app/ai-chat-assistant-chatone/id6642630027/reviews)** |
| Number of ratings | — | **756** |
| Positive reviews | — | 40.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | — | Freemium |
| Size | 53 MB | 56 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Natalia Swierczyna](https://appshunter.io/developer/1735961535) | [DeepGronk AI LLC](https://appshunter.io/developer/1660915111) |

## What reviewers say

### Rex Voice

[App page](https://appshunter.io/ios/app/rex-voice/id6504091114)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 min | $0.99 | one-time |
| 30 min | $2.99 | one-time |
| 1 hour | $4.99 | one-time |


### AI Chat Assistant

[App page](https://appshunter.io/ios/app/ai-chat-assistant-chatone/id6642630027)

This AI companion offers intelligent chat, image generation, and detailed image descriptions. It provides specialized assistants for various tasks and saves conversation history. Start for free and upgrade for advanced AI capabilities.

**Highlights:** AI Chat Assistant, AI Image Generation, Smart Image Descriptions, Specialized AI Assistants, Chat History

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChatONE AI Pro Subscription | $6.99 | per 7 days |
| ChatONE AI Pro Subscription | $14.99 | per month |
| ChatONE AI Pro Subscription | $19.99 | per 2 months |
| ChatONE AI Pro Subscription | $29.99 | per 6 months |
| ChatONE AI Pro Subscription | $49.99 | per year |
| ChatONE AI Pro Subscription | $54.99 | per year |
| 10k Imagizo Credits | $9.99 | one-time |
| 30k Imagizo Credits | $19.99 | one-time |
| 100k Imagizo Credits | $49.99 | one-time |
| ChatONE AI Lifetime | $199.99 | one-time |

**What reviewers like**

- ✨ Pretty smart AI
- 💡 Useful features
- 🚀 Fast responses
- 👍 Good for brainstorming
- ✍️ Drafts emails quickly

**What reviewers complain about**

- 💸 Expensive subscription
- ❌ Many errors and typos
- 👎 Not worth the money
- 🚫 Limited free usage
- 🤔 Unclear pricing

**Reported bugs**

- Poor spelling and grammar
- Phrases make no sense
- App not working
- Image generation error
- Cannot restore purchase

**Requested features**

- Allow users to use features by watching ads
- Lower subscription price
- Improve voice integration
- Add dark mode option
- Improve UI for different AI models


## Frequently asked questions

### Is Rex Voice free?

Rex Voice is free to download, with in-app purchases available.

### Is AI Chat Assistant free?

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

### Do Rex Voice or AI Chat Assistant have ads?

AI Chat Assistant shows ads; Rex Voice does not.

### Which is updated more often, Rex Voice or AI Chat Assistant?

Rex Voice ships an update every 10 days, and AI Chat Assistant weekly. Most recently, Rex Voice was updated on October 25, 2026 and AI Chat Assistant on October 30, 2026.

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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.*