# GreatAI vs 知我 AI

The clearest difference is in-app purchases: 知我 AI at none against GreatAI's 3. 知我 AI also leads on ads (none vs shown). GreatAI's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | GreatAI | 知我 AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (8 ratings)](https://appshunter.io/ios/app/greatai-ai/id6473672362/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 3 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [远青 谢](https://appshunter.io/developer/1705671931) | [杰栋 何](https://appshunter.io/developer/1896629335) |

## What reviewers say

### GreatAI

[App page](https://appshunter.io/ios/app/greatai-ai/id6473672362)

This AI assistant helps with creative writing, content generation, and provides virtual companionship. Users can chat about various topics and even create custom AI personas with specified voice characteristics. It offers subscription plans for enhanced features.

**Highlights:** AI-powered writing and content creation, Virtual emotional companionship, Customizable AI personas, Voice output with customizable gender and language, Private or public AI persona options, Topic-based conversations

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周订阅 | $3.99 | per 7 days |
| 月订阅 | $7.99 | per month |
| 年订阅 | $29.99 | per year |


### 知我 AI

[App page](https://appshunter.io/ios/app/ai/id6780978880)

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

**In-app purchases:** none


## Frequently asked questions

### Is GreatAI free?

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

### Is 知我 AI free?

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

### Do GreatAI or 知我 AI have ads?

GreatAI shows ads; 知我 AI does not.

### Which is updated more often, GreatAI or 知我 AI?

GreatAI ships an update every 2 weeks, and 知我 AI every 2 weeks. Most recently, GreatAI was updated on October 24, 2026 and 知我 AI on October 31, 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.*