RadioactivityCounter vs InterSpec Radiation Analysis
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).
InterSpec Radiation Analysis
Analyze nuclear radiation spectral data to identify nuclides, determine source activity, and calculate shielding. Supports various detector file formats and includes tools for dose rate calculations and nuclide decay information.
- Spectral nuclear radiation data analysis
- Nuclide identification
- Source activity determination
- Shielding amount calculation
- Spectral file format conversion
- Dose rate calculations
- Interactive nuclide decay information
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InterSpec assists in analyzing spectral nuclear radiation data, using a peak-based methodology. Common uses include identifying nuclides present, determining source activity, shielding amounts, source age, or other nuclear reactions present. InterSpec also provides a number of other tools useful for analyzing radiation data including spectral file format converting, dose rate calculations, interactive nuclide decay and reference information, gamma cross section calculations and references, and more. InterSpec can open data files from most common spectral radiation detectors (e.g., most NaI, HPGe, LaBr, CLYC, CsI, etc. based systems) and assist in their analysis.
Screenshots
Verdict
The clearest difference is price: InterSpec Radiation Analysis at Free against RadioactivityCounter's $4.99. InterSpec Radiation Analysis also leads on rating (4.3 vs 3.1) and review sentiment (100% vs 68%). RadioactivityCounter's advantage is iOS requirement (8.0 vs 11.0). On ratings volume, update cadence, ads and in-app purchases 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
InterSpec Radiation Analysis is free to download; RadioactivityCounter costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
InterSpec Radiation Analysis holds the better App Store score, 4.3 against 3.1. Both are backed by a comparable volume of ratings — 10 and 12 respectively. Written reviews point the same way: 68% of RadioactivityCounter's written reviews are positive against 100% of InterSpec Radiation Analysis's.
RadioactivityCounter ships an update every 15 months, InterSpec Radiation Analysis every 11 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.
| Parameter | RadioactivityCounter | InterSpec Radiation Analysis |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 3.1 (10 ratings) | 4.3 (12 ratings) — better |
| Positive reviews | 68.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 10 | 12 — better |
| Update frequency | Every 15 months | Every 11 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 11 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Dipl.-Ing. Rolf-Dieter Klein | William Johnson |
Customer experience
RadioactivityCounter
InterSpec Radiation Analysis
In-app purchases
RadioactivityCounter
No in-app purchases
InterSpec Radiation Analysis
No in-app purchases
Questions
Is RadioactivityCounter free?
Is InterSpec Radiation Analysis free?
Which has better reviews, RadioactivityCounter or InterSpec Radiation Analysis?
Do RadioactivityCounter or InterSpec Radiation Analysis have ads?
Which is updated more often, RadioactivityCounter or InterSpec Radiation Analysis?
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