# Dusts vs 인에어(inair)

The clearest difference is update cadence: Dusts at every 6 weeks against 인에어(inair)'s every 9 months. On price, review sentiment, 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.

Dusts ships an update every 6 weeks, 인에어(inair) every 9 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Dusts | 인에어(inair) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (31 ratings)](https://appshunter.io/ios/app/dusts/id1231747836/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 92.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 9 months |
| Monetization | Free | Free |
| Size | 31 MB | 14 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yeram Jueng](https://appshunter.io/developer/1510266351) | [한국환경공단](https://appshunter.io/developer/873915688) |

## What reviewers say

### Dusts

[App page](https://appshunter.io/ios/app/dusts/id1231747836)

This app provides real-time air quality information, including fine dust, ultrafine dust, and integrated air quality index. It locates the nearest measurement station and displays data with intuitive graphs and color-coded backgrounds. Widgets and Apple Watch support offer convenient access to air quality updates.

**Highlights:** Real-time fine dust concentration, Real-time ultrafine dust concentration, Integrated air quality index, Nearest measurement station locator, Widgets for home/lock screen, Apple Watch app and complications, Dark mode support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 인에어(inair)

[App page](https://appshunter.io/ios/app/inair/id1560468948)

This app provides real-time fine dust (PM-2.5) measurements from subway stations across the country. It offers hourly and 24-hour moving average data, a collaboration between environmental agencies and railway operators.

**Highlights:** Real-time PM-2.5 measurements, Subway station data, Hourly average data, 24-hour moving average data, Nationwide coverage

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dusts free?

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

### Is 인에어(inair) free?

인에어(inair) is free to download, with no in-app purchases.

### Do Dusts or 인에어(inair) have ads?

Neither Dusts nor 인에어(inair) shows ads.

### Which is updated more often, Dusts or 인에어(inair)?

Dusts ships an update every 6 weeks, and 인에어(inair) every 9 months. Most recently, Dusts was updated on October 29, 2026 and 인에어(inair) on October 30, 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.*