# PM2.5台灣 vs 台灣空污警報

The clearest difference is review sentiment: 台灣空污警報 at 56% against PM2.5台灣's 17%. PM2.5台灣's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. 台灣空污警報 sells 1 one-off in-app purchase. PM2.5台灣 asks for nothing beyond the download.

PM2.5台灣 ships an update every 2 weeks, 台灣空污警報 monthly. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | PM2.5台灣 | 台灣空污警報 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (14 ratings)](https://appshunter.io/ios/app/id1362015277/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | 16.7% of reviews | **55.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free | — |
| Size | 9 MB | 27 MB |
| Requires iOS | **7.0** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YEH TSUNG MING](https://appshunter.io/developer/324655388) | [DoItWell Application Ltd](https://appshunter.io/developer/505381716) |

## What reviewers say

### PM2.5台灣

[App page](https://appshunter.io/ios/app/pm25/id990281102)

Stay informed about PM2.5 air quality in Taiwan. Receive custom notifications for high pollution levels and track real-time rankings across different regions.

**Highlights:** Real-time PM2.5 concentration tracking, Customizable pollution level notifications, Nationwide and regional rankings, Alerts for exceeding pollution thresholds, Daily time-based reminders

**Features:** macOS Compatibility

**In-app purchases:** none


### 台灣空污警報

[App page](https://appshunter.io/ios/app/id1362015277)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 贊助方案 (回饋服務營運期間之去廣告功能) | $2.99 | one-time |


## Frequently asked questions

### Is PM2.5台灣 free?

PM2.5台灣 is free to download, with no in-app purchases.

### Is 台灣空污警報 free?

台灣空污警報 is free to download, with in-app purchases available.

### Do PM2.5台灣 or 台灣空污警報 have ads?

台灣空污警報 shows ads; PM2.5台灣 does not.

### Which is updated more often, PM2.5台灣 or 台灣空污警報?

PM2.5台灣 ships an update every 2 weeks, and 台灣空污警報 monthly. Most recently, PM2.5台灣 was updated on October 3, 2026 and 台灣空污警報 on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*