Comparison

RadioactivityCounter vs InterSpec Radiation Analysis

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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).

About

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.

Highlights
  • Spectral nuclear radiation data analysis
  • Nuclide identification
  • Source activity determination
  • Shielding amount calculation
  • Spectral file format conversion
  • Dose rate calculations
  • Interactive nuclide decay information
Features
Read full description

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

RadioactivityCounter2 screens
InterSpec Radiation Analysis4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
RadioactivityCounter versus InterSpec Radiation Analysis: the parameters behind the verdict, then further details
ParameterRadioactivityCounterInterSpec Radiation Analysis
Price$4.99Free — better
Rating3.1 (10 ratings)4.3 (12 ratings) — better
Positive reviews68.4% of reviews100.0% of reviews — better
Number of ratings1012 — better
Update frequencyEvery 15 monthsEvery 11 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better11.0
Further details — not scored
Size11 MB80 MB
Age rating4+4+
DeveloperDipl.-Ing. Rolf-Dieter KleinWilliam Johnson

Customer experience

RadioactivityCounter

All ratings10 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews19 reviews
Positive68.4%
Neutral5.3%
Negative26.3%

InterSpec Radiation Analysis

All ratings10 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RadioactivityCounter

No in-app purchases

None

InterSpec Radiation Analysis

No in-app purchases

Questions

Is RadioactivityCounter free?
RadioactivityCounter costs $4.99, with no in-app purchases.
Is InterSpec Radiation Analysis free?
InterSpec Radiation Analysis is free to download, with no in-app purchases.
Which has better reviews, RadioactivityCounter or InterSpec Radiation Analysis?
InterSpec Radiation Analysis is rated higher. RadioactivityCounter averages 3.1 out of 5 from 10 ratings, while InterSpec Radiation Analysis averages 4.3 from 12 ratings.
Do RadioactivityCounter or InterSpec Radiation Analysis have ads?
Neither RadioactivityCounter nor InterSpec Radiation Analysis shows ads.
Which is updated more often, RadioactivityCounter or InterSpec Radiation Analysis?
RadioactivityCounter ships an update every 15 months, and InterSpec Radiation Analysis every 11 months. Most recently, RadioactivityCounter was updated on October 30, 2026 and InterSpec Radiation Analysis on October 24, 2026.

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