RadioactivityCounter vs Magnetometer ∞
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).
Magnetometer ∞
Visualize magnetic fields in real-time with precision charts and monitor X, Y, Z axis readings. Ideal for scientific research, education, and field work, this app offers professional-grade accuracy and an intuitive interface for easy data interpretation.
- Real-time magnetic field visualization
- X, Y, Z axis readings in microteslas
- Scientific research tool
- Educational aid
- Field work companion
- Intuitive interface
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Magnetometer Visualizer - Explore the invisible magnetic world - Visualize magnetic fields in real-time with precision charts - Monitor X, Y, Z axis readings in microteslas (µT) - Perfect for scientific research, education, and field work - Professional-grade accuracy for reliable measurements - Clean, intuitive interface for easy data interpretation Whether you're a researcher, student, or professional, unlock the power of magnetic field analysis with stunning real-time visualization. Privacy Policy: https://apps.fawkeswei.com/magnetometer/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Magnetometer ∞ at Free against RadioactivityCounter's $4.99. Magnetometer ∞ also leads on rating (4.4 vs 3.1) and update cadence (every 2 weeks vs every 15 months). RadioactivityCounter's advantage is in-app purchases (none vs 2) and ads (none vs shown). On 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
Magnetometer ∞ is free to download; RadioactivityCounter costs $4.99 up front. Magnetometer ∞ sells 2 in-app purchases, starting at $1.99 per 7 days. RadioactivityCounter asks for nothing beyond the download.
Magnetometer ∞ holds the better App Store score, 4.4 against 3.1. That said, the two scores are not equally well evidenced: Magnetometer ∞ has 59 ratings behind it against 10, so its average is the more settled of the two.
RadioactivityCounter ships an update every 15 months, Magnetometer ∞ every 2 weeks. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.
| Parameter | RadioactivityCounter | Magnetometer ∞ |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 3.1 (10 ratings) | 4.4 (59 ratings) — better |
| Positive reviews | 68.4% of reviews | — |
| Number of ratings | 10 | 59 — better |
| Update frequency | Every 15 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #184 — better | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 11 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Dipl.-Ing. Rolf-Dieter Klein | Fawkes Wei |
Customer experience
RadioactivityCounter
Magnetometer ∞
In-app purchases
RadioactivityCounter
No in-app purchases
Magnetometer ∞
- Weekly$1.997 Days
- Lifetime$9.99
Questions
Is RadioactivityCounter free?
Is Magnetometer ∞ free?
Which has better reviews, RadioactivityCounter or Magnetometer ∞?
Do RadioactivityCounter or Magnetometer ∞ have ads?
Which is updated more often, RadioactivityCounter or Magnetometer ∞?
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