# RadioactivityCounter vs EMF Detector

The clearest difference is price: EMF Detector at Free against RadioactivityCounter's $4.99. EMF Detector also leads on rating (4.3 vs 3.1) and update cadence (every 2 weeks vs every 15 months). RadioactivityCounter's advantage is review sentiment (68% vs 25%) and in-app purchases (none vs 3). On ads and device support there is nothing between them.

EMF Detector is free to download; RadioactivityCounter costs $4.99 up front. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. RadioactivityCounter asks for nothing beyond the download.

EMF Detector holds the better App Store score, 4.3 against 3.1. That said, the two scores are not equally well evidenced: EMF Detector has 319 ratings behind it against 10, so its average is the more settled of the two. Written reviews complicate that: 68% of RadioactivityCounter's written reviews are positive against 25% of EMF Detector's, so the app with the better star average is not the one people write more warmly about.

RadioactivityCounter ships an update every 15 months, EMF Detector every 2 weeks. The most recent releases landed on October 5, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RadioactivityCounter | EMF Detector |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.1 (10 ratings)](https://appshunter.io/ios/app/radioactivitycounter/id464004677/reviews) | **[4.3 (319 ratings)](https://appshunter.io/ios/app/emf-detector-radiation-reader/id6572300713/reviews)** |
| Number of ratings | 10 | **319** |
| Positive reviews | **68.4% of reviews** | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 11 MB | 11 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dipl.-Ing. Rolf-Dieter Klein](https://appshunter.io/developer/309148367) | [新雨 李](https://appshunter.io/developer/1559932632) |

## What reviewers say

### RadioactivityCounter

[App page](https://appshunter.io/ios/app/radioactivitycounter/id464004677)

Transform your phone into a functional radioactivity counter. Measure gamma and some beta radiation using your device's camera sensor after calibration. Useful for personal use and experimentation with radiation sources.

**Highlights:** Real radioactivity counter functionality, Converts phone into Geiger Müller Counter, Measures gamma and some beta radiation, Requires calibration for accuracy, Expert setup for precise measurements, Supports various iPhone and iPad models

**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 RadioactivityCounter free?

RadioactivityCounter costs $4.99, with no in-app purchases.

### Is EMF Detector free?

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

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

EMF Detector is rated higher. RadioactivityCounter averages 3.1 out of 5 from 10 ratings, while EMF Detector averages 4.3 from 319 ratings.

### Do RadioactivityCounter or EMF Detector have ads?

Neither RadioactivityCounter nor EMF Detector shows ads.

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

RadioactivityCounter ships an update every 15 months, and EMF Detector every 2 weeks. Most recently, RadioactivityCounter was updated on October 5, 2026 and EMF Detector on October 13, 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.*