I have one, hate it. I can't see crap on a bright day. My mini4 recently started getting blocks of video that move around in the feed. It's on it's way to the list of unsupported devices soon. lol
what has been fixing that for now is to restart the iPad. Works for some, others it does not. Similar issues with Iphone 6 users.
DJI go4 app is garbage, and too big. Look at memory it eats up! eats up cpu and memory as much if not more than the device OS. MP video was perfect up until they added the Mavic Air. After that it has been **** and then more of the same. DJI answer is sending that dumb list of devices.