# AirQualityMeter vs Reefcast.io

The clearest difference is ads: Reefcast.io at none against AirQualityMeter's shown. Reefcast.io also leads on update cadence (every 4 days vs every 3 months) and device support (4 vs 2). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AirQualityMeter ships an update every 3 months, Reefcast.io every 4 days. The most recent releases landed on September 1, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | AirQualityMeter | Reefcast.io |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 8 MB | 79 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Yuta Endo](https://appshunter.io/developer/1621719139) | [Ahsan Saleem](https://appshunter.io/developer/1877516301) |

## What reviewers say

### AirQualityMeter

[App page](https://appshunter.io/ios/app/airqualitymeter/id1660451275)

This app provides real-time air quality measurements and forecasts up to 24 hours in advance. It helps users manage their physical condition and prepare for allergies by notifying them of pollutants like PM2.5 and PM10. Location services enable automatic weather data acquisition for your current area.

**Highlights:** Real-time air pollutant notifications (PM2.5, PM10), 24-hour air pollution level forecast, Global coverage, Automatic location-based weather data, Allergy countermeasure information

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

**In-app purchases:** none


### Reefcast.io

[App page](https://appshunter.io/ios/app/reefcastio/id6759223340)

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

**In-app purchases:** none


## Frequently asked questions

### Is AirQualityMeter free?

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

### Is Reefcast.io free?

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

### Do AirQualityMeter or Reefcast.io have ads?

AirQualityMeter shows ads; Reefcast.io does not.

### Which is updated more often, AirQualityMeter or Reefcast.io?

AirQualityMeter ships an update every 3 months, and Reefcast.io every 4 days. Most recently, AirQualityMeter was updated on September 1, 2026 and Reefcast.io on September 6, 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.*