# ChatCat vs AIChatDoo

The clearest difference is in-app purchases: ChatCat at none against AIChatDoo's 3. AIChatDoo's advantage is update cadence (every 5 days vs every 11 months) and iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

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

ChatCat ships an update every 11 months, AIChatDoo every 5 days. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ChatCat | AIChatDoo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 days** |
| Size | 11 MB | 9 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [茵 吕](https://appshunter.io/developer/1337000923) | [NovaMind AI](https://appshunter.io/developer/1837941195) |

## What reviewers say

### ChatCat

[App page](https://appshunter.io/ios/app/chatcat-ai-chatbot/id6742164947)

**Features:** macOS Compatibility

**In-app purchases:** none


### AIChatDoo

[App page](https://appshunter.io/ios/app/aichatdoo-write-think-create/id6777403201)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| week membership | $3.99 | per 7 days |
| year membership | $14.99 | per year |
| lifetime membership | $19.99 | one-time |


## Frequently asked questions

### Is ChatCat free?

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

### Is AIChatDoo free?

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

### Do ChatCat or AIChatDoo have ads?

Neither ChatCat nor AIChatDoo shows ads.

### Which is updated more often, ChatCat or AIChatDoo?

ChatCat ships an update every 11 months, and AIChatDoo every 5 days. Most recently, ChatCat was updated on October 5, 2026 and AIChatDoo on October 12, 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.*