# Air Detector vs QR Master

The clearest difference is in-app purchases: Air Detector at none against QR Master's 3. Air Detector also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.4). QR Master's advantage is update cadence (every 5 weeks vs every 5 months). On price and device support there is nothing between them.

Both are free to download. QR Master sells 3 in-app purchases, starting at $1.99 per month. Air Detector asks for nothing beyond the download.

Air Detector ships an update every 5 months, QR Master every 5 weeks. The most recent releases landed on November 3, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Air Detector | QR Master |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Size | 23 MB | 62 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen Everbest Machinery Industry Co.,Ltd](https://appshunter.io/developer/564470332) | [Ahmet Bohur](https://appshunter.io/developer/1884060211) |

## What reviewers say

### Air Detector

[App page](https://appshunter.io/ios/app/air-detector/id1644798469)

**Features:** macOS Compatibility

**In-app purchases:** none


### QR Master

[App page](https://appshunter.io/ios/app/qr-master-create-qr/id6779288165)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Premium | $1.99 | per month |
| One Year Premium | $14.99 | per year |
| Life Time Premium | $19.99 | one-time |


## Frequently asked questions

### Is Air Detector free?

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

### Is QR Master free?

QR Master is free to download, with in-app purchases available.

### Do Air Detector or QR Master have ads?

QR Master shows ads; Air Detector does not.

### Which is updated more often, Air Detector or QR Master?

Air Detector ships an update every 5 months, and QR Master every 5 weeks. Most recently, Air Detector was updated on November 3, 2026 and QR Master on October 16, 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.*