Even though 2D rendering on both MacOS and iOS are based on Quartz, and thus essentially equivalent to PDF's imaging model, up until now, iOS has been a disappointment in the world of creative professionals.
ColorSync, the industry-leading color management technology developed by Apple and implemented throughout their desktop line, has long satisfied graphic designers, photographers and others with its ability to render intended color.
Apple's mobile devices... not so much.
When announcing the 9.7 inch iPad Pro Apple touted its True Tone display, which includes automatic white point adjustment for ambient lighting conditions, and new support for the new-generation DCI-P3 color gamut.
As Brandon Chester of Anandtech points out, what Apple failed to highlight is that with True Tone, iOS is now comparable to ColorSync, enabling new generations of iOS devices to operate within Mac OS workflows that depend on ColorSync.