RadioactivityCounter vs Physics Toolbox Sensor Suite
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).
Physics Toolbox Sensor Suite
This app turns your smartphone into a scientific instrument suite, measuring sound, light, magnetism, and motion. It's ideal for students, educators, researchers, and hobbyists to record, analyze, and export real-time scientific data.
- Measure sound, light, magnetism, and motion
- Record, analyze, and export real-time data
- Includes G-Force Meter, Accelerometer, Gyroscope
- Features Sound Meter, Oscilloscope, Spectrum Analyzer
- Light Meter, Color Detector, Stroboscope
- Compass, Magnetometer, AR visualization
- Barometer, GPS, AR Ruler
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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
Verdict
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 chart position (#184 vs unranked). 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
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.
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.
RadioactivityCounter ships an update every 15 months, Physics Toolbox Sensor Suite weekly. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.
| Parameter | RadioactivityCounter | Physics Toolbox Sensor Suite |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 3.1 (10 ratings) | 4.7 (1.8K ratings) — better |
| Positive reviews | 68.4% of reviews | 80.8% of reviews — better |
| Number of ratings | 10 | 1.8K — better |
| Update frequency | Every 15 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #184 — better | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 11 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | Dipl.-Ing. Rolf-Dieter Klein | Chrystian Vieyra |
Customer experience
RadioactivityCounter
Physics Toolbox Sensor Suite
In-app purchases
RadioactivityCounter
No in-app purchases
Physics Toolbox Sensor Suite
- Upgrade to Pro$5.99
Questions
Is RadioactivityCounter free?
Is Physics Toolbox Sensor Suite free?
Which has better reviews, RadioactivityCounter or Physics Toolbox Sensor Suite?
Do RadioactivityCounter or Physics Toolbox Sensor Suite have ads?
Which is updated more often, RadioactivityCounter or Physics Toolbox Sensor Suite?
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