# OpenRadiation vs EMF Detector

The clearest difference is rating: EMF Detector at 4.3 against OpenRadiation's 2.0. EMF Detector also leads on review sentiment (25% vs 0%) and ratings volume (319 vs 4). OpenRadiation's advantage is in-app purchases (none vs 3). On price, ads and device support there is nothing between them.

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

EMF Detector holds the better App Store score, 4.3 against 2.0. That said, the two scores are not equally well evidenced: EMF Detector has 319 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 0% of OpenRadiation's written reviews are positive against 25% of EMF Detector's.

OpenRadiation ships an update every 3 months, EMF Detector every 2 weeks. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | OpenRadiation | EMF Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (4 ratings)](https://appshunter.io/ios/app/openradiation/id1246249831/reviews) | **[4.3 (319 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews)** |
| Number of ratings | 4 | **319** |
| Positive reviews | 0.0% of reviews | **25.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 54 MB | 11 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Autorite de surete nucleaire et de radioprotection](https://appshunter.io/developer/1861431469) | [新雨 李](https://appshunter.io/developer/1559932632) |

## What reviewers say

### OpenRadiation

[App page](https://appshunter.io/ios/app/openradiation/id1246249831)

Measure ambient radioactivity levels and assess your exposure to ionizing radiation using a compatible sensor. Contribute to a citizen science project by sharing your measurements to build a collaborative database.

**Highlights:** Measure radioactivity levels, Assess radiation exposure, Contribute to citizen science, Collaborative data database, Share measurements, View data online

**Features:** macOS Compatibility

**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 OpenRadiation free?

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

### Is EMF Detector free?

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

### Which has better reviews, OpenRadiation or EMF Detector?

EMF Detector is rated higher. OpenRadiation averages 2.0 out of 5 from 4 ratings, while EMF Detector averages 4.3 from 319 ratings.

### Do OpenRadiation or EMF Detector have ads?

Neither OpenRadiation nor EMF Detector shows ads.

### Which is updated more often, OpenRadiation or EMF Detector?

OpenRadiation ships an update every 3 months, and EMF Detector every 2 weeks. Most recently, OpenRadiation was updated on June 1, 2026 and EMF Detector on September 21, 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.*