When you take off or even just before you take off you should hear the app say "the home point has been recorded, please check it on the map".
I don't take off until I hear that. Then after you take off, always makes sure to hover 10 feet or so over the takeoff point to insure a good image for precision landing.
I don't take off until I hear that. Then after you take off, always makes sure to hover 10 feet or so over the takeoff point to insure a good image for precision landing.