all software using for 3d mapping use waypoint method, and required your drone to fly autonomously
related to the signal, that something you need to search for, maybe incompatibility with software, your phone or something others
Thanks, @Lurker @dexgeo great introduction for a newbie like me. I have been using the trial version of dronedeploy. Not sure why the drone signal is not stable, as I never let the drone fly autonomously so I am bit nervous when the drone is out of my control.