# PM2.5台灣 vs EdiGreen

The clearest difference is ads: PM2.5台灣 at none against EdiGreen's shown. PM2.5台灣 also leads on update cadence (every 2 weeks vs every 3 months) and review sentiment (17% vs 0%). On price, in-app purchases 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.

PM2.5台灣 ships an update every 2 weeks, EdiGreen every 3 months. The most recent releases landed on October 3, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | PM2.5台灣 | EdiGreen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.6 (7 ratings)](https://appshunter.io/ios/app/edigreen/id1086893817/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | **16.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | **Free** | Ad-supported |
| Size | 9 MB | 39 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [YEH TSUNG MING](https://appshunter.io/developer/324655388) | [EDIMAX](https://appshunter.io/developer/324658320) |

## 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


### EdiGreen

[App page](https://appshunter.io/ios/app/edigreen/id1086893817)

Instantly monitor PM2.5 air quality with real-time updates every 5 minutes. This app provides an easy-to-understand AQI index, global monitoring station data, and personalized recommendations to protect your respiratory health.

**Highlights:** Real-time PM2.5 air quality information, Temperature and humidity microclimate query, 24-hour air quality trend chart, Daily AQI index and action advice, Global monitoring station map, Favorite station list, GPS location for nearby stations

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

**In-app purchases:** none


## Frequently asked questions

### Is PM2.5台灣 free?

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

### Is EdiGreen free?

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

### Do PM2.5台灣 or EdiGreen have ads?

EdiGreen shows ads; PM2.5台灣 does not.

### Which is updated more often, PM2.5台灣 or EdiGreen?

PM2.5台灣 ships an update every 2 weeks, and EdiGreen every 3 months. Most recently, PM2.5台灣 was updated on October 3, 2026 and EdiGreen on September 23, 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.*