Just bought a new in the box DX-4 at a thrift store for 4 bucks. It flies great but i cannot get the camera to work using the app you mentioned or a half dozen others i tried, so i just gave up trying. Also, this one has a self contained battery that cannot be removed and that kinda' sucks, but for 4 dollars i ain't complaining. Great video!
That was my first drone back in 2015. I was talking pictures of a hawk and lost power. Drone fell in very heavy brush, I never found it. Really liked it. Cool video. Thanks, A.