Those of you calling this a waste... Youre idiots!!! Now pay attention: black cat systems makes hardware radiation detectors that interface w computers. This is not a government run service, its strictly voluntary. When an owner of the hardware is testing the radiation level, it registers on a map for all to see. The more people testing, the more readings. This app is a mobile version of their map on the website, nothing more, nothing less and its worth a buck for me to have access to the info. If theres no reading in your area do us all a favor and get some friends together, buy a monitor unit, connect it to your computer and let us all see what your readings are. Oh and I dont work for the company, Im just a guy on the west coast concerned about the impending Fukushima disaster.