iPhone Screenshots


(You cannot measure the radiation only by using this application program)

iPhone can be used as a radiation detector, as it is called Geiger counter, by connecting the voice output of the Pocket Geiger Counter with the microphone input.
For more information about Pocket Geiger Counter, see http://www.radiation-watch.org

Sensor: PIN photo diode x8 (reverse biased and shielded)
Detectable radiations: Beta and Gamma radiation
Measurement range: 0.05uSv/h~10mSv/h (Calibrated using Cs-137), 0.01cpm~300000cpm
Measuring time: about 5 minutes at the dose rate of 0.05uSv/h
Energy response: :662keV~1333keV

- uSv/h and its counting error calculation
- CPM calculation
- Manual setting interface for time range and threshold *Pro version only
- Oscilloscope *Pro version only
- Detection log visualization *Pro version only
- Circuit diagram *Pro version only

We are making the smart radiation detector that everyone can buy at a low price especially in and around Fukushima.
The project is supported by volunteer engineers, designers and scientists.

What’s New

Version 1.37

add parameter for iPhone SE

Ratings and Reviews

1.6 out of 5
7 Ratings

7 Ratings

birdcatcher9 ,


It does nothing but give error messages and does not explain how to resolve them. The app makes you think that you are to blame for the errors. It gave me a headache. I'm deleting it now.

Thatonecommentguy ,

Here is your answer as to why it doesn’t work,

You need to connect a pocket Geiger counter, nice reading skills though.

Arez_Gamer ,

Literally Doo doo

This app works, but you need to hook it up to a real Geiger Counter in order for it to work! I thought the whole point of the app was to not need an external device! This thing is a big fat pile of doo doo!


932.9 KB

Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Japanese

Age Rating
Rated 4+
© 2011 Tangible Design


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