# Hansen Gas Detector vs EMF Detector

The clearest difference is in-app purchases: Hansen Gas Detector at none against EMF Detector's 3. EMF Detector's advantage is update cadence (every 2 weeks vs every 36 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. Hansen Gas Detector asks for nothing beyond the download.

Hansen Gas Detector ships an update every 36 months, EMF Detector every 2 weeks. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Hansen Gas Detector | EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (319 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews)** |
| Number of ratings | — | **319** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 11 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MSA - The Safety Company](https://appshunter.io/developer/482957840) | [新雨 李](https://appshunter.io/developer/1559932632) |

## What reviewers say

### Hansen Gas Detector

[App page](https://appshunter.io/ios/app/hansen-gas-detector/id1506705824)

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

**In-app purchases:** none


### EMF Detector

[App page](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713)

Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.

**Highlights:** EMF monitoring, Electromagnetic field detection, Radiation level measurement, Environmental safety assessment, Real-time EMF readings

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| unlimited features | $4.99 | per month |
| unlimited features | $14.99 | one-time |


## Frequently asked questions

### Is Hansen Gas Detector free?

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

### Is EMF Detector free?

EMF Detector is free to download, with in-app purchases available.

### Do Hansen Gas Detector or EMF Detector have ads?

Neither Hansen Gas Detector nor EMF Detector shows ads.

### Which is updated more often, Hansen Gas Detector or EMF Detector?

Hansen Gas Detector ships an update every 36 months, and EMF Detector every 2 weeks. Most recently, Hansen Gas Detector was updated on October 14, 2026 and EMF Detector on October 18, 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.*