Hi. This is what I am trying to test: On a good day, I read that a Samsung Galaxy can return an accuracy down to 3 meters (9 feet), but even if I were to stand very still, it can still wander within a circle of probability of how many meters? BUT that exceeds GPS WAAS accuracy. So I am dubious. Unless of course, the GPS chip has build-in WAAS? Again I am sceptical. I want to try out a few GPS location tester app on Droids for accuracy, using devices from different manufacturers. There seems to be a few apps out there, can anybody recommend a reliable one that you have used or heard that someone has used?