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Have you ever wondered what amount of radiation is emitted by devices such as scanners at airports? If yes, then now you have a simple way of measuring that radiation through your smartphone, all thanks to a tool called Radioactivity Counter.

measure radiation levels

Radioactivity Counter is a new application for Android devices. The function of the app is to help you measure radiation in your surroundings. Interestingly, the app makes use of your smartphone’s camera.

If you cover the camera with black tape, then the radiation in your surroundings will be registered as specs of white light in the CMOS sensors in the camera that come equipped on the phone. Through this method you can primarily measure gamma radiations and a few higher order beta radiations.

For a demonstration of the app, check out the following video:



  • A user-friendly phone app.
  • Compatible with Android devices.
  • Lets you measure radiation in the surrounding.
  • Makes use of the CMOS sensors in your phone.
  • Similar tools: Wikisensor.

Check out Radioactivity Counter @

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  1. Jack Cola
    May 7, 2012 at 2:41 am

    It's a pitty it isn't free :(

  2. Jon Green (
    May 4, 2012 at 9:59 am

    Guys, that's *awesome*! That app's going into SPACE!

    (Check for how.)

    We've been looking for a radiation counter experiment, and we're sending an Android phone as the Instrument Control Processor anyway, so that's another tick on the manifest, and a zero experiment launch weight. Job's a good-un!

  3. Thomas Waldmann
    March 1, 2012 at 11:19 pm

    cool app, works!

  4. Rdklein
    February 3, 2012 at 2:09 pm

    The RadioacitvityCounter is out now also for iOS devices on the App Store (iPhone 3GS, iPhone4, iPhone4S,iPod 2, iPad 2). Its similar as our Android version but there is a automatic setting so now device data must be entered by the user and a ne wcloud modus for a cloud chamber like display.
    regards developer (Rolf-Dieter Klein)).