I have the iPhone 5 and its terrible. Hard to get proper focus can't control aperture or shutter speed. Tiny screen compared to competitors. Get the 1dx! Or get a cheaper phone and 1dx. If apple doesn't start doing things better I'm gonna switch. My ipad mini doesn't have a flash! How do you forget that!
The reception on the 1dx is terrible. Can't get a signal anywhere. Could find only 1app. The screen isn't retina and isn't gorilla glass. No WiFi either.
5D IV, 5DS R, 7D II, EOS-M, Powershot G3 X, 400mm DO II, 300/2.8 II, 1.4xTC III, 2xTC III, EF 1.8 STM, EF 70-200/4 IS, EF 24-105, 15-85, 100-400 II, Sigma 10-20, Sigma 150-600mm C, EOS-M5 15-45, f/2 22, 11-22, Samyang 8mm f/2.8 fisheye