# Fast AI vs Caitty AI

The clearest difference is rating: Caitty AI at 5.0 against Fast AI's 3.0. Fast AI's advantage is iOS requirement (15.1 vs 17.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Fast AI sells 1 in-app purchase, starting at $5.99 per 7 days and Caitty AI sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Caitty AI holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Fast AI | Caitty AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/fast-ai-chatbot-assistant/id1663617334/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/caitty-ai-smart-assistant/id6757544665/reviews)** |
| Number of ratings | **3** | 2 |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Size | 150 MB | 8 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Advenworks Ltd.](https://appshunter.io/developer/329900469) | [传立 甘](https://appshunter.io/developer/860384553) |

## What reviewers say

### Fast AI

[App page](https://appshunter.io/ios/app/fast-ai-chatbot-assistant/id1663617334)

This AI chatbot offers personalized conversations and instant assistance using advanced natural language processing. Powered by ChatGPT, it can help with daily tasks, answer questions, provide writing assistance, and engage in conversations.

**Highlights:** AI-powered conversations, Instant assistance, Natural language processing, Writing help, Text completion, Powered by ChatGPT

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fast.ai Pro | $5.99 | per 7 days |


### Caitty AI

[App page](https://appshunter.io/ios/app/caitty-ai-smart-assistant/id6757544665)

This AI companion offers creative inspiration, programming help, and instant answers to your questions. It features specialized roles like a coding expert or creative partner, ensuring a tailored experience. Upgrade for unlimited messages and advanced AI access.

**Highlights:** Smart conversation with context, Multiple specialized AI roles, Instant Q&A, Creative inspiration, Programming and debugging assistance, Learning explanations, Privacy and security focus

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $0.99 | per 7 days |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $29.99 | per year |


## Frequently asked questions

### Is Fast AI free?

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

### Is Caitty AI free?

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

### Which has better reviews, Fast AI or Caitty AI?

Caitty AI is rated higher. Fast AI averages 3.0 out of 5 from 3 ratings, while Caitty AI averages 5.0 from 2 ratings.

### Do Fast AI or Caitty AI have ads?

Both Fast AI and Caitty AI show ads.

### Which is updated more often, Fast AI or Caitty AI?

Fast AI ships an update every 2 weeks, and Caitty AI every 2 weeks. Most recently, Fast AI was updated on October 18, 2026 and Caitty AI on October 24, 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.*