# 미세미세 vs 셀리온 스마트 BT

The clearest difference is review sentiment: 미세미세 at 92% against 셀리온 스마트 BT's 25%. 미세미세 also leads on rating (4.8 vs 1.0) and ratings volume (658 vs 3). 셀리온 스마트 BT's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. 미세미세 sells 2 in-app purchases, starting at $1.49 per month. 셀리온 스마트 BT asks for nothing beyond the download.

미세미세 holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: 미세미세 has 658 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 92% of 미세미세's written reviews are positive against 25% of 셀리온 스마트 BT's.

미세미세 ships an update every 4 weeks, 셀리온 스마트 BT monthly. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | 미세미세 | 셀리온 스마트 BT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (658 ratings)](https://appshunter.io/ios/app/id1091911730/reviews)** | [1.0 (3 ratings)](https://appshunter.io/ios/app/bt/id1537929464/reviews) |
| Number of ratings | **658** | 3 |
| Positive reviews | **91.7% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 121 MB | 23 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LifeOverflow Inc.](https://appshunter.io/developer/1091911729) | [에스피케어](https://appshunter.io/developer/1537929466) |

## What reviewers say

### 미세미세

[App page](https://appshunter.io/ios/app/id1091911730)

This app provides real-time air quality and fine dust forecasts with intuitive icons and charts. It also offers accurate weather information, including temperature and hourly/daily forecasts. An optional mask alert feature helps locate pharmacies with available masks.

**Highlights:** Real-time fine dust concentration (PM10 & Yellow Dust), Real-time ultrafine dust concentration (PM2.5), Fine dust forecast, Integrated air environment index, Weather forecasts (real-time, hourly, daily), Mask availability alerts, Nationwide fine dust map

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 광고제거 서비스 | $1.49 | per month |
| 광고제거 서비스 | $16.49 | per year |

**What reviewers like**

- 🚀 Accurate micro dust forecast
- 👍 Intuitive and easy-to-use interface
- 💡 WHO-based air quality standards
- 📊 Detailed air quality data and forecasts
- 🌐 Supports multiple locations

**What reviewers complain about**

- 🐛 Network issues and crashes
- 🔒 Limited language options (no English)
- 📍 Missing Korean language support for some locations (e.g. Dokdo)
- 🔌 Concerns about reliability of data compared to other sources

**Reported bugs**

- Widgets not working properly
- Crashes or network errors when checking air quality

**Requested features**

- Add support for Apple Watch
- Provide air quality alerts and notifications
- Expand location coverage and language support
- Improve widget functionality
- Integrate with other weather/air quality apps


### 셀리온 스마트 BT

[App page](https://appshunter.io/ios/app/bt/id1537929464)

This app automatically adjusts the temperature of a connected heating mat based on the user's local external temperature. It uses a smart algorithm to ensure optimal comfort by syncing with real-time weather data.

**Highlights:** Automatic temperature adjustment, External temperature synchronization, Smart heating mat algorithm, User local temperature integration

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 미세미세 free?

미세미세 is free to download, with in-app purchases available.

### Is 셀리온 스마트 BT free?

셀리온 스마트 BT is free to download, with no in-app purchases.

### Which has better reviews, 미세미세 or 셀리온 스마트 BT?

미세미세 is rated higher. 미세미세 averages 4.8 out of 5 from 658 ratings, while 셀리온 스마트 BT averages 1.0 from 3 ratings.

### Do 미세미세 or 셀리온 스마트 BT have ads?

미세미세 shows ads; 셀리온 스마트 BT does not.

### Which is updated more often, 미세미세 or 셀리온 스마트 BT?

미세미세 ships an update every 4 weeks, and 셀리온 스마트 BT monthly. Most recently, 미세미세 was updated on November 11, 2026 and 셀리온 스마트 BT on November 7, 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.*