There are many apps that track airplanes by type, tail number, altitude, ownership, flight plan, etc. A drone is just another type of aircraft. Not surprised this would become an app. There is literally an app for just about everything. The only thing that makes it sound ominous is the "locate the operator with pinpoint accuracy" thing. That being said, I'm pretty sure that if you can see my drone flying it wouldn't take Sherlock Holmes to find me standing out in the field it's flying over or next to. So the app doesn't concern me in the least on that score. What's the concern for you guys? I'm guessing I'm not seeing it from your point of view, but would appreciate a legitimate (and hopefully respectful) discussion on the matter.