RadioactivityCounter vs EMF Detector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RadioactivityCounter
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.
- 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
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RadioactivityCounter This application is a real working radioactivity counter without any extra hardware needed ! It will turn your phone into a Geiger Müller Counter to measure radioactivity after proper calibration. ** Attention after upgrading iOS to a higher iOS do the calibrate again, as camera data properties might have changed ** Disclaimer: The type of radiation picked up by the camera can be dangerous/detrimental to the user's health as well as cause damage to the device. Important note: The camera sensor can measure gamma radiation (CS137 for example) and some beta radiation (depends on the energy if the beta rays can pass through the plastic parts - for example H3 or K14 are weak sources). It cannot measure alpha rays (PO210) For AM241 though its primary a Alpha source also some gamma radiation is emitted and might be detectable for a longer measurement. Please check our homepages for examples and hints on how to measure. We did calibrations with several iPod2*, IPhone 3GS*, iPhone 4*, iPhone 4S, iPhone5, iPhone 5S iPhone 6, 6s and iPad 2, iPad 3* devices at the Helmholtz Research Centre, Munich. we used a CS137 test source from 10 µGy/h till 1 Sv/h for each of the phones we had. The values are stored for a rough start on the application (all devices differ a little bit). For precise professional measurement the devices must be adjusted to the sensor which is possible with the expert setup. For personal use the defaults should be sufficient (please give us feedback). * = Attention some phone might not be compatible due the new version of iOS or missing features (gps precision using sim cards)- please try to use an older rev of the App which should be available according to my settings (1.3).
EMF Detector
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.
- EMF monitoring
- Electromagnetic field detection
- Radiation level measurement
- Environmental safety assessment
- Real-time EMF readings
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Monitor your surroundings with precision using our EMF Monitoring app, designed exclusively for iOS. This innovative application transforms your iPhone into a powerful EMF detector, enabling you to identify electromagnetic fields in various environments. As you move through different areas, the app continuously measures EMF levels, allowing you to easily pinpoint zones of high and low radiation. Whether you're concerned about safety at home, in the workplace, or in public areas, EMF Monitoring provides the insights you need to assess environmental safety and make informed decisions about your surroundings. This app is using the standard Apple Terms of Use (EULA) https://www.apple.com/legal/ internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | RadioactivityCounter | EMF Detector |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 3.1 (10 ratings) | 4.3 (319 ratings) — better |
| Positive reviews | 68.4% of reviews — better | 25.0% of reviews |
| Number of ratings | 10 | 319 — better |
| Update frequency | Every 15 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 11 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Dipl.-Ing. Rolf-Dieter Klein | 新雨 李 |
Customer experience
RadioactivityCounter
EMF Detector
In-app purchases
RadioactivityCounter
No in-app purchases
EMF Detector
- unlimited features2 variants$4.991 Month
- unlimited features$14.99
Questions
Is RadioactivityCounter free?
Is EMF Detector free?
Which has better reviews, RadioactivityCounter or EMF Detector?
Do RadioactivityCounter or EMF Detector have ads?
Which is updated more often, RadioactivityCounter or EMF Detector?
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