# AI Chat vs Catalyst

The clearest difference is rating: Catalyst at 5.0 against AI Chat's 1.0. Catalyst also leads on in-app purchases (none vs 3) and ads (none vs shown). AI Chat's advantage is iOS requirement (15.0 vs 18.0). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. AI Chat sells 3 in-app purchases, starting at $3.99 per 7 days. Catalyst asks for nothing beyond the download.

Catalyst holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

AI Chat ships an update every 8 days, Catalyst every 9 days. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | AI Chat | Catalyst |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/ai-chat-chat-assistant/id6446834003/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/catalyst-ai-workspace/id6787500410/reviews)** |
| Number of ratings | **2** | 1 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 9 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 31 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [Linh Dan Le](https://appshunter.io/developer/1678924251) | [ObjectGraph LLC](https://appshunter.io/developer/284700705) |

## What reviewers say

### AI Chat

[App page](https://appshunter.io/ios/app/ai-chat-chat-assistant/id6446834003)

Engage in conversations, get quick answers to any question, and improve your writing with real-time feedback. This AI-powered tool supports all languages and offers diverse topics for learning and discussion.

**Highlights:** Ask any question, AI Writing Assistant, Voice chat with AI, Supports all languages, Various talking topics

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Chats Weekly | $3.99 | per 7 days |
| Unlimited Chats Monthly | $9.99 | per month |
| Unlimited Chats Yearly | $79.99 | per year |


### Catalyst

[App page](https://appshunter.io/ios/app/catalyst-ai-workspace/id6787500410)

Access multiple leading AI models in one app, compare their responses, and generate images or videos. It also supports Python code execution and web searches with sources. Bring your own API keys for flexibility and control over your data.

**Highlights:** Access multiple AI models, Compare AI model responses, Generate images and video clips, Secure Python sandbox, Web search with sources, Attach files and photos, Persistent conversation memory

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

**In-app purchases:** none


## Frequently asked questions

### Is AI Chat free?

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

### Is Catalyst free?

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

### Which has better reviews, AI Chat or Catalyst?

Catalyst is rated higher. AI Chat averages 1.0 out of 5 from 2 ratings, while Catalyst averages 5.0 from 1 ratings.

### Do AI Chat or Catalyst have ads?

AI Chat shows ads; Catalyst does not.

### Which is updated more often, AI Chat or Catalyst?

AI Chat ships an update every 8 days, and Catalyst every 9 days. Most recently, AI Chat was updated on October 14, 2026 and Catalyst on October 8, 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.*