Interesting idea, but doesn't work well It is very difficult to fully cover the camera. A black electric tape, for example, is not entirely opaque. The "counts" that you see are mostly optical photons that leak through the tape. To check, compare a measurement indoors to a measurement in direct sunlight - you end up getting > 10kcpm rates, easily.
It works great! But, it depends on your phone. I have an Optimus LG D-500. It's not rated well for My phone. It has a slow response on my phone. It only works well around a strong radioactive source, such as Cs-137, Sr-90, Ra-226, Am-241, or my X-Ray tube up close. It depends on the energies and activity of the source. This wouldn't work with C-14, H-3, Po-210, or Pu-239. Test it thoroughly, and use it until you get the best results.
More discrete than having a geiger counter in your everyday carry Yes this isn't an adjusted official tool. But it's better than nothing. As long as you have electricity when SHTF (solar, generator) to charge your phone, you have some sort of a clue what's up when your cellphone starts ticking. LG P880, Cyanogenmod Nightly
It Works! I have worked in the nuclear energy field for 25 years, with a specialty in radiation protection. I initially laughed at the idea of a smartphone being used to detect and measure radiation. I was wrong! Although this doesn't respond in the same range as your typical "Geiger" counter, it does respond to radiation linearly at levels greater than approximately 2 mrem/hr (100x average background) to 200 mrem/hr. Most people do not have access to rad sources, so many will probably assume that it doesn't work.
This is nothing short of a brilliant idea! It is not a precision measuring device, but it works and you can even check which material they are electron bombing in the rotating anode in your local airport security from the spectral lines.
The best of this kind! Upgrades for free! The rooms, flats, and buildings, are radioactive! Therfore are so many cases of cancer. The building materials are radioctive.This app can save you!!
new menu button, several internal function update. And currently test url for uploading data (will be provided to test users)
new split modus, for better noise handling with low radiations. Help updates new design. Support for the new OS versions. Less permissions needed.
* higher cover lense level for some phones required.
Protecting you from radiation even when you are not expecting radiation!