# Air Quality(AQI) vs COmeter

The clearest difference is ads: COmeter at none against Air Quality(AQI)'s shown. Air Quality(AQI)'s advantage is update cadence (every 2 months vs every 14 months). On price, in-app purchases, device support 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.

Air Quality(AQI) ships an update every 2 months, COmeter every 14 months. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Air Quality(AQI) | COmeter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 14 months |
| Size | 14 MB | 109 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nandha Kumar Ravi](https://appshunter.io/developer/1430918680) | [KAKHA GIORGASHVILI](https://appshunter.io/developer/1501353984) |

## What reviewers say

### Air Quality(AQI)

[App page](https://appshunter.io/ios/app/air-qualityaqi/id6468081103)

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

**In-app purchases:** none


### COmeter

[App page](https://appshunter.io/ios/app/cometer/id6670443641)

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

**In-app purchases:** none


## Frequently asked questions

### Is Air Quality(AQI) free?

Air Quality(AQI) is free to download, with no in-app purchases.

### Is COmeter free?

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

### Do Air Quality(AQI) or COmeter have ads?

Air Quality(AQI) shows ads; COmeter does not.

### Which is updated more often, Air Quality(AQI) or COmeter?

Air Quality(AQI) ships an update every 2 months, and COmeter every 14 months. Most recently, Air Quality(AQI) was updated on October 16, 2026 and COmeter on October 8, 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.*