# 四有云 vs ChatYY

The clearest difference is in-app purchases: 四有云 at none against ChatYY's 12. ChatYY's advantage is update cadence (every 2 weeks vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ChatYY sells 12 one-off in-app purchases. 四有云 asks for nothing beyond the download.

四有云 ships an update every 5 months, ChatYY every 2 weeks. The most recent releases landed on October 3, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 四有云 | ChatYY |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/chatyy/id6463835053/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 170 MB | 39 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [北京及至奇点科技有限公司](https://appshunter.io/developer/1653088512) | [Wuhan Zhongke Huayan Technology Co., Ltd](https://appshunter.io/developer/1705149660) |

## What reviewers say

### 四有云

[App page](https://appshunter.io/ios/app/id6444207355)

**Features:** Vision Pro support

**In-app purchases:** none


### ChatYY

[App page](https://appshunter.io/ios/app/chatyy/id6463835053)

This AI-powered virtual assistant helps with daily tasks, providing answers to questions and inspiration for writing, coding, and design. It aims to keep users organized, save time, and simplify life.

**Highlights:** Personalized virtual assistant, Answer questions, Writing inspiration, Coding assistance, Design ideas, Task management

**Features:** macOS Compatibility

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 加油包_20 | $2.99 | one-time |
| 加油包_29 | $3.99 | one-time |
| 加油包_40 | $5.99 | one-time |
| VIP（1个月） | $6.99 | one-time |
| 加油包_60 | $8.99 | one-time |
| SVIP（1个月） | $9.99 | one-time |
| 加油包_89 | $12.99 | one-time |
| VIP（3个月） | $14.99 | one-time |
| 加油包_180 | $24.99 | one-time |
| SVIP（3个月） | $24.99 | one-time |
| VIP（12个月） | $29.99 | one-time |
| SVIP（12个月） | $49.99 | one-time |


## Frequently asked questions

### Is 四有云 free?

四有云 is free to download, with no in-app purchases.

### Is ChatYY free?

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

### Do 四有云 or ChatYY have ads?

Neither 四有云 nor ChatYY shows ads.

### Which is updated more often, 四有云 or ChatYY?

四有云 ships an update every 5 months, and ChatYY every 2 weeks. Most recently, 四有云 was updated on October 3, 2026 and ChatYY on September 26, 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.*