I would like to share with all my experience with the apple lightening to digital AV adapter. I connected my devices to a computer monitor.
I connected my iPad Air (latest generation) and the resolution was terrible! i had to lower all graphics to minimum to keep FPS high. AND iPad does not show up a widescreen.
I connected my iPhone X and it was perfect! whole screen filled. I was able to use high resolution and FPS was smooth.
Lastly… i suggest having an external controller. I use a dualshock 4 (Playstation 4 controller) to fly. PM if you are interested in my sensitivities and button assignments. It works great. I tried flying with the phone, but it is kind of clunky with all of the cables connected to the phone.
Happy Infinite Flying!