YES this does work.

The poster above me probably just didnt understand the limitations of this app. It DOES work, just depends on how much you expect it to be able to do for you to think it doesnt work. No, its not like a wand at the airport. But I turned the sensitivity to max and it works perfect for a stud finder. I tested it on different objects/types of metals to see if it was just a fluke that it seemed to be working, and I can assure you that this app is legit, Unlike some of the other ones I tried. No, you wont find buried treasure with it, but at least it does what it says it does. Worth the $0 it cost for sure

PMac85 about Metal Detector and Spy Camera, v1.1