Connect Smartphone and Understand Functionality

here's a measuring wheel so we measure out fences long distances and stuff to figure out square footage stuff like that check it out you hook your iPhone to it or your phone to it so Works off of the measurement of the wheel itself and the gyroscope in your phone um it will do all the math for you here in a second so there's an app on your phone yep oh my God so it's drawing a map so for measuring a fence I mean you just