I can see using night shift on my IPhone 6 Plus, as it has no TruTone technology. However on the IPad Pro, should I enable TruTone only or both tru tone and night shift? Why are both an option on the iPad Pro? I read somewhere night shift muddies up the tru tone effect. Or that they somehow conflict with each other? If tru tone is looking for ambient light temperature in the room, would that even work if night shift is already making things yellowish or warm in the evening hours. Let's say the room were mostly blue light at night? Maybe I'm thinking about it too much here? I can say that with tru tone enabled alone, my are just comfortable during daytime hours. But perhaps night shift will help me transition into slumber on both my iPhone and iPad Pro.