# 인에어(inair) vs 미세먼지

The clearest difference is ads: 인에어(inair) at none against 미세먼지's shown. 인에어(inair) also leads on review sentiment (100% vs 83%) and iOS requirement (12.0 vs 18.0). 미세먼지's advantage is update cadence (every 4 days vs every 9 months). On price, in-app purchases, monetization model 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.

인에어(inair) ships an update every 9 months, 미세먼지 every 4 days. The most recent releases landed on September 12, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 인에어(inair) | 미세먼지 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/id6447787559/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 83.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 14 MB | 17 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [한국환경공단](https://appshunter.io/developer/873915688) | [Seungtae Jang](https://appshunter.io/developer/1664620859) |

## What reviewers say

### 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


### 미세먼지

[App page](https://appshunter.io/ios/app/id6447787559)

This app provides real-time air quality forecasts based on previous measurements and a predictive model. It offers multiple widget options and an Apple Watch app for convenient access to air quality data.

**Highlights:** 8-step air quality standard, Multiple widget options, Apple Watch app and complications, Predictive air quality modeling, Real-time air quality data

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

**In-app purchases:** none


## Frequently asked questions

### Is 인에어(inair) free?

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

### Is 미세먼지 free?

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

### Do 인에어(inair) or 미세먼지 have ads?

미세먼지 shows ads; 인에어(inair) does not.

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

인에어(inair) ships an update every 9 months, and 미세먼지 every 4 days. Most recently, 인에어(inair) was updated on September 12, 2026 and 미세먼지 on September 14, 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.*