# 广东省空气质量实况与预报手机发布系统Pub vs 知否天气

The clearest difference is update cadence: 知否天气 at every 9 days against 广东省空气质量实况与预报手机发布系统Pub's every 3 months. 广东省空气质量实况与预报手机发布系统Pub's advantage is iOS requirement (7.0 vs 12.0). On price, ads, in-app purchases and device support there is nothing between them.

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

广东省空气质量实况与预报手机发布系统Pub ships an update every 3 months, 知否天气 every 9 days. The most recent releases landed on February 28, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 广东省空气质量实况与预报手机发布系统Pub | 知否天气 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/id1504641063/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Size | 29 MB | 27 MB |
| Requires iOS | **7.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [广东旭诚科技有限公司](https://appshunter.io/developer/1048882371) | [健雄 吴](https://appshunter.io/developer/1461728159) |

## What reviewers say

### 广东省空气质量实况与预报手机发布系统Pub

[App page](https://appshunter.io/ios/app/pub/id1477157378)

**In-app purchases:** none


### 知否天气

[App page](https://appshunter.io/ios/app/id1504641063)

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

**In-app purchases:** none


## Frequently asked questions

### Is 广东省空气质量实况与预报手机发布系统Pub free?

广东省空气质量实况与预报手机发布系统Pub is free to download, with no in-app purchases.

### Is 知否天气 free?

知否天气 is free to download, with no in-app purchases.

### Do 广东省空气质量实况与预报手机发布系统Pub or 知否天气 have ads?

Neither 广东省空气质量实况与预报手机发布系统Pub nor 知否天气 shows ads.

### Which is updated more often, 广东省空气质量实况与预报手机发布系统Pub or 知否天气?

广东省空气质量实况与预报手机发布系统Pub ships an update every 3 months, and 知否天气 every 9 days. Most recently, 广东省空气质量实况与预报手机发布系统Pub was updated on February 28, 2026 and 知否天气 on September 22, 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.*