Do NOT waste your money!!

It doesnt tell you how to use. I much rather go online and get accurate info. This Geiger counter is NOT useful as it doesnt have any help features. I still dont get what the 3 different time increments are for. As for the map, you can see it online for free. Waste of an app. I wish I could give it ZERO stars.

DJParadoxNYC about Real Geiger Counter, v1.2