# 鲨鱼天气 vs 读空气

The clearest difference is iOS requirement: 鲨鱼天气 at 13.0 against 读空气's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

鲨鱼天气 ships an update every 3 weeks, 读空气 fortnightly. Both last shipped on November 13, 2026.

## The numbers

| Metric | 鲨鱼天气 | 读空气 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (198 ratings)](https://appshunter.io/ios/app/pm25/id1207730070/reviews)** | — |
| Number of ratings | **198** | — |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 59 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [LI XIANG](https://appshunter.io/developer/1444835904) | [希 王](https://appshunter.io/developer/6818630177) |

## What reviewers say

### 鲨鱼天气

[App page](https://appshunter.io/ios/app/pm25/id1207730070)

Get accurate weather forecasts and real-time air quality monitoring, including PM2.5 data sourced from the US Embassy. Receive minute-level precipitation forecasts and alerts for severe weather to help you prepare.

**Highlights:** 15-day accurate weather forecast, 72-hour PM2.5 air quality forecast, 2-hour minute-level precipitation forecast, Disaster alerts for severe weather, Optimized for iOS 11 and iPhone X

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

**In-app purchases:** none


### 读空气

[App page](https://appshunter.io/ios/app/id6825633281)

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

**In-app purchases:** none


## Frequently asked questions

### Is 鲨鱼天气 free?

鲨鱼天气 is free to download, with no in-app purchases.

### Is 读空气 free?

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

### Do 鲨鱼天气 or 读空气 have ads?

Neither 鲨鱼天气 nor 读空气 shows ads.

### Which is updated more often, 鲨鱼天气 or 读空气?

鲨鱼天气 ships an update every 3 weeks, and 读空气 fortnightly. Most recently, 鲨鱼天气 was updated on November 13, 2026 and 读空气 on November 13, 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.*