# EdiGreen vs TaiwanAirQuality

The clearest difference is update cadence: EdiGreen at every 3 months against TaiwanAirQuality's every 6 months. TaiwanAirQuality's advantage is iOS requirement (11.0 vs 15.0). On price, ads, 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.

EdiGreen ships an update every 3 months, TaiwanAirQuality every 6 months. The most recent releases landed on October 31, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | EdiGreen | TaiwanAirQuality |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (7 ratings)](https://appshunter.io/ios/app/edigreen/id1086893817/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 49.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Ad-supported | — |
| Size | 39 MB | 5 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [EDIMAX](https://appshunter.io/developer/324658320) | [YI HAN TSAI](https://appshunter.io/developer/1047549327) |

## What reviewers say

### 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


### TaiwanAirQuality

[App page](https://appshunter.io/ios/app/taiwanairquality/id1320457381)

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

**In-app purchases:** none


## Frequently asked questions

### Is EdiGreen free?

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

### Is TaiwanAirQuality free?

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

### Do EdiGreen or TaiwanAirQuality have ads?

Both EdiGreen and TaiwanAirQuality show ads.

### Which is updated more often, EdiGreen or TaiwanAirQuality?

EdiGreen ships an update every 3 months, and TaiwanAirQuality every 6 months. Most recently, EdiGreen was updated on October 31, 2026 and TaiwanAirQuality on October 26, 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.*