I need to shoot 360 degree HDRI's, I'm aware I can do this manually but I'm looking for a faster option.  One big problem is I have a P4P+ so the controller won't allow for 3rd party software and as far as I know DJI has no HDRI app.  Short of getting a new controller that uses and iPad are there anyother options?

Can you not disconnect the + screen and just plug a sep phone or tablet into the usb??

No it's integrated into the controller, no way to disconnect it.