I tried using this app on my iPhone on two different nights. Both were at night because I was trying to test the street lamps in the parking lot on my college campus. The first night I tried to use this app, I had to put my phone on airplane mode because so many advertisements were showing up that it was draining my phone battery. After I managed to stop the advertisements from showing up, I quickly realized that this app doesn’t actually work very well. I got zeros for almost every spot that I measured around the perimeter and inside of the lot, even when I was directly under a light. Because of this, I placed a white piece of paper on the ground so that the light could reflect off it, and still I got only zeros. At first, I thought maybe the street lights were just bad; however, even after taking my phone indoors and trying it, I was still getting very few numbers other than zero. Overall, the advertisements are too much and the app itself doesn’t even work.