# Radioactivity Counter

> REAL Radioactivity counter based on a camera sensor, no extra hardware required

Canonical page: [https://chrome-stats.com/d/com.rdklein.radioactivity](https://chrome-stats.com/d/com.rdklein.radioactivity)

## Overview

- **ID:** `com.rdklein.radioactivity`
- **Platform:** Android
- **Type:** Android app
- **Status:** Removed
- **Publisher:** Rolf-Dieter Klein
- **Category:** TOOLS
- **Downloads:** 24,221
- **Rating:** 4.27 / 5 (462 ratings)
- **Version:** 2.1
- **Last updated:** 2018-05-31
- **First published:** 2011-09-07
- **Data as of:** 2025-02-18
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.rdklein.radioactivity)
- **Website:** [http://www.hotray-info.de](http://www.hotray-info.de/)
- **Privacy policy:** [http://www.rdklein.de/html/datenschutz.html](http://www.rdklein.de/html/datenschutz.html)

## Description

"Radioactivity Counter" is an innovative Android app that utilizes your smartphone's camera sensor to measure radiation levels, functioning similarly to a Geiger counter. With just a black tape to cover the lens, users can detect gamma and some beta radiation. The app offers features like raw data saving, temperature recording, and data export in various formats. Ideal for scientific exploration and safety, it requires careful calibration and awareness of potential hazards. Get involved in enhancing its accuracy through user feedback!

## Review summary

### Pros

- The app is effective in detecting radiation and provides accurate readings compared to Geiger counters.
- It has a clever concept that utilizes camera sensors to detect radiation.
- Users find it fun and educational to monitor radiation levels in their environment.
- The app has a strong community of users who appreciate its functionality and support open-source development.

### Cons

- The app does not work on newer devices or operating systems, especially Android 12.
- Many users report it being glitchy, freezing or failing to recognize the camera.
- It lacks an in-built scale or comparison chart for understanding safe radiation levels.
- Users experience issues with camera light interference affecting readings.

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.rdklein.radioactivity)