Comparison

RadioactivityCounter vs Physics Toolbox Sensor Suite

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

Physics Toolbox Sensor Suite

This app turns your smartphone into a scientific instrument suite, enabling measurement, recording, analysis, and export of real-time sensor data. It offers tools for kinematics, acoustics, light, magnetism, and more, suitable for students, educators, researchers, and hobbyists.

Highlights
  • Real-time sensor data measurement
  • Data recording and analysis
  • Data export functionality
  • Kinematics tools (accelerometer, gyroscope)
  • Acoustics tools (sound meter, oscilloscope)
  • Magnetism tools (compass, magnetometer)
  • AR visualization for magnetic fields and measurements
Features
Read full description

Whether you’re a student, educator, researcher, or hobbyist, Physics Toolbox transforms your smartphone’s built-in sensors into a powerful suite of scientific instruments. Easily measure, record, analyze, and export real-time data for a variety of uses—from classroom experiments to cutting-edge research. KINEMATICS G-Force Meter Linear Accelerometer Gyroscope Inclinometer Motion Visualizer (LiDAR-tracked position and velocity) ACOUSTICS Sound Meter Tone Detector Tone Generator Oscilloscope Spectrum Analyzer Spectrogram LIGHT Light Meter Color Detector Proximeter Stroboscope MAGNETISM Compass Magnetometer Magna-AR (AR visualization of magnetic field vectors) OTHER Barometer GPS - latitude, longitude, altitude, speed, direction, number of satellites Ruler-AR (AR-estimated measurements) COMBINATION Multi Record Roller Coaster GAME Play (data-verified challenges)

Screenshots

RadioactivityCounter2 screens
Physics Toolbox Sensor Suite4 screens

Verdict

The call

The clearest difference is price: Physics Toolbox Sensor Suite at Free against RadioactivityCounter's $4.99. Physics Toolbox Sensor Suite also leads on rating (4.7 vs 3.1) and update cadence (weekly vs every 15 months). RadioactivityCounter's advantage is in-app purchases (none vs 1) and iOS requirement (8.0 vs 16.0). 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

CostPrice · In-app purchases · Ads · Monetization

Physics Toolbox Sensor Suite is free to download; RadioactivityCounter costs $4.99 up front. Physics Toolbox Sensor Suite sells 1 one-off in-app purchase. RadioactivityCounter asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Physics Toolbox Sensor Suite holds the better App Store score, 4.7 against 3.1. That said, the two scores are not equally well evidenced: Physics Toolbox Sensor Suite has 1.8K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 68% of RadioactivityCounter's written reviews are positive against 81% of Physics Toolbox Sensor Suite's.

UpkeepUpdate frequency

RadioactivityCounter ships an update every 15 months, Physics Toolbox Sensor Suite weekly. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

Scorecard8 real differences · 2 level
RadioactivityCounter versus Physics Toolbox Sensor Suite: the parameters behind the verdict, then further details
ParameterRadioactivityCounterPhysics Toolbox Sensor Suite
Price$4.99Free — better
Rating3.1 (10 ratings)4.7 (1.8K ratings) — better
Positive reviews68.4% of reviews80.6% of reviews — better
Number of ratings101.8K — better
Update frequencyEvery 15 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS8.0 — better16.0
Further details — not scored
Size11 MB78 MB
Age rating4+4+
DeveloperDipl.-Ing. Rolf-Dieter KleinChrystian Vieyra

Customer experience

RadioactivityCounter

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

Physics Toolbox Sensor Suite

All ratings1,798 ratings
Positive93.8%
Neutral2.9%
Negative3.3%
Written reviews124 reviews
Positive80.6%
Neutral8.1%
Negative11.3%

In-app purchases

None

RadioactivityCounter

No in-app purchases

1 purchases

Physics Toolbox Sensor Suite

One-time1
  • Upgrade to Pro$5.99

Questions

Is RadioactivityCounter free?
RadioactivityCounter costs $4.99, with no in-app purchases.
Is Physics Toolbox Sensor Suite free?
Physics Toolbox Sensor Suite is free to download, with in-app purchases available.
Which has better reviews, RadioactivityCounter or Physics Toolbox Sensor Suite?
Physics Toolbox Sensor Suite is rated higher. RadioactivityCounter averages 3.1 out of 5 from 10 ratings, while Physics Toolbox Sensor Suite averages 4.7 from 1.8K ratings.
Do RadioactivityCounter or Physics Toolbox Sensor Suite have ads?
Neither RadioactivityCounter nor Physics Toolbox Sensor Suite shows ads.
Which is updated more often, RadioactivityCounter or Physics Toolbox Sensor Suite?
RadioactivityCounter ships an update every 15 months, and Physics Toolbox Sensor Suite weekly. Most recently, RadioactivityCounter was updated on October 5, 2026 and Physics Toolbox Sensor Suite on October 12, 2026.

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