# RadioactivityCounter vs Physics Toolbox Sensor Suite

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.

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 October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | RadioactivityCounter | Physics Toolbox Sensor Suite |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.1 (10 ratings)](https://appshunter.io/ios/app/radioactivitycounter/id464004677/reviews) | **[4.7 (1.8K ratings)](https://appshunter.io/ios/app/physics-toolbox-sensor-suite/id1128914250/reviews)** |
| Number of ratings | 10 | **1.8K** |
| Positive reviews | 68.4% of reviews | **80.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 11 MB | 78 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dipl.-Ing. Rolf-Dieter Klein](https://appshunter.io/developer/309148367) | [Chrystian Vieyra](https://appshunter.io/developer/998187453) |

## What reviewers say

### RadioactivityCounter

[App page](https://appshunter.io/ios/app/radioactivitycounter/id464004677)

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:** macOS Compatibility

**In-app purchases:** none


### Physics Toolbox Sensor Suite

[App page](https://appshunter.io/ios/app/physics-toolbox-sensor-suite/id1128914250)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $5.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*