# AI Chat小助手 vs DiffMind

The clearest difference is update cadence: DiffMind at every 8 days against AI Chat小助手's every 5 weeks. AI Chat小助手's advantage is iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AI Chat小助手 sells 4 in-app purchases, starting at $4.99 per 7 days and DiffMind sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

AI Chat小助手 ships an update every 5 weeks, DiffMind every 8 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | AI Chat小助手 | DiffMind |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Size | 21 MB | 28 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [广志 李](https://appshunter.io/developer/1689223989) | [香港异度思维科技有限公司 Hong Kong DiffMind Technology Co., Limited](https://appshunter.io/developer/6790750723) |

## What reviewers say

### AI Chat小助手

[App page](https://appshunter.io/ios/app/ai-chat-chatbot/id6451243460)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级会员周订阅 | $4.99 | per 7 days |
| 高级会员月订阅 | $9.99 | per month |
| 高级会员季订阅 | $14.99 | per 3 months |
| 高级会员年订阅 | $29.99 | per year |


### DiffMind

[App page](https://appshunter.io/ios/app/diffmind-ai/id6790750721)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus 月卡 | $19.90 | one-time |
| Pro 月卡 | $39.90 | one-time |
| Plus 季卡 | $50.90 | one-time |
| Pro 季卡 | $101.99 | one-time |
| Plus 年卡 | $155.99 | one-time |
| Pro 年卡 | $309.99 | one-time |


## Frequently asked questions

### Is AI Chat小助手 free?

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

### Is DiffMind free?

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

### Do AI Chat小助手 or DiffMind have ads?

Neither AI Chat小助手 nor DiffMind shows ads.

### Which is updated more often, AI Chat小助手 or DiffMind?

AI Chat小助手 ships an update every 5 weeks, and DiffMind every 8 days. Most recently, AI Chat小助手 was updated on October 27, 2026 and DiffMind 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.*