# AQI vs 读空气

The clearest difference is device support: AQI at 4 against 读空气's 1. AQI also leads on iOS requirement (15.0 vs 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.

AQI ships an update every 10 days, 读空气 fortnightly. The most recent releases landed on November 12, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | AQI | 读空气 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Size | 9 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [翔 黄](https://appshunter.io/developer/1525042908) | [希 王](https://appshunter.io/developer/6818630177) |

## What reviewers say

### AQI

[App page](https://appshunter.io/ios/app/aqi/id6661027286)

**Features:** macOS Compatibility, Apple Watch app, 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 AQI free?

AQI 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 AQI or 读空气 have ads?

Neither AQI nor 读空气 shows ads.

### Which is updated more often, AQI or 读空气?

AQI ships an update every 10 days, and 读空气 fortnightly. Most recently, AQI was updated on November 12, 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.*