# 晴天钟 vs 江苏空气质量

The clearest difference is iOS requirement: 晴天钟 at 6.0 against 江苏空气质量's 14.0. On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

晴天钟 ships an update every 9 days, 江苏空气质量 every 10 days. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | 晴天钟 | 江苏空气质量 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (3 ratings)](https://appshunter.io/ios/app/id946485291/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | **34.8% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 10 days |
| Size | 1 MB | 2 MB |
| Requires iOS | **6.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Youhua Technology Company Limited](https://appshunter.io/developer/423977368) | [中科三清科技有限公司](https://appshunter.io/developer/1211590929) |

## What reviewers say

### 晴天钟

[App page](https://appshunter.io/ios/app/id946485291)

**Features:** macOS Compatibility

**In-app purchases:** none


### 江苏空气质量

[App page](https://appshunter.io/ios/app/id1440697804)

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

**In-app purchases:** none


## Frequently asked questions

### Is 晴天钟 free?

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

### Is 江苏空气质量 free?

江苏空气质量 is free to download, with no in-app purchases.

### Do 晴天钟 or 江苏空气质量 have ads?

Neither 晴天钟 nor 江苏空气质量 shows ads.

### Which is updated more often, 晴天钟 or 江苏空气质量?

晴天钟 ships an update every 9 days, and 江苏空气质量 every 10 days. Most recently, 晴天钟 was updated on November 1, 2026 and 江苏空气质量 on November 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*