# 知否天气 vs 吉林省空气质量

The clearest difference is update cadence: 知否天气 at every 9 days against 吉林省空气质量's every 2 months. 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.

知否天气 ships an update every 9 days, 吉林省空气质量 every 2 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 知否天气 | 吉林省空气质量 |
| --- | --- | --- |
| 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 9 days** | Every 2 months |
| Size | 27 MB | 72 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [健雄 吴](https://appshunter.io/developer/1461728159) | [中科三清科技有限公司](https://appshunter.io/developer/1211590929) |

## What reviewers say

### 知否天气

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

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

**In-app purchases:** none


### 吉林省空气质量

[App page](https://appshunter.io/ios/app/id1533075676)

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

**In-app purchases:** none


## Frequently asked questions

### Is 知否天气 free?

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

### Is 吉林省空气质量 free?

吉林省空气质量 is free to download, with no in-app purchases.

### Do 知否天气 or 吉林省空气质量 have ads?

Neither 知否天气 nor 吉林省空气质量 shows ads.

### Which is updated more often, 知否天气 or 吉林省空气质量?

知否天气 ships an update every 9 days, and 吉林省空气质量 every 2 months. Most recently, 知否天气 was updated on November 3, 2026 and 吉林省空气质量 on October 27, 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.*