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

I wish I could give zero stars


I’m running 11.1.1 and I keep getting errors.
“No connection”

I installed it twice with the same results.

Does not work


Don’t bother

Not cool to take away features on update


First it was just the schematics for building your own detector that was part of the pro version. Now they took away features like adjusting threshold and time duration from the lite and moving it to pro only. Kickstarter funders should at least be given this functionality to adjust threshold and time duration. But still to take away features when it was originally included is not right.

Update for version 1.04:
Still didn't add back the features they took away from the previous version. The app used to look like the first screenshot posted but now you can only get that with the pro version. Rating still stands at 1 star unless they put back the features.


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


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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