Have changed this to an Epub for 1.5 (Updated Dec 7, 2016 with Gold Master Help File)
Here is a link to the Affinity Photo Help File in Epub Format for Version 1.5 (December 7, 2016) - works great in Ibooks. Very convenient to have in a portable format - or to use side by side with Affinity Photo on your computer. Link: https://app.box.com/s/bjv07ey7ryvqbg16zh4yjazcd65uw85c
Alternate Link: https://1drv.ms/u/s!AjuKWjfPlktwgfoEGfpoz65qzzsz_A
Just download it to your ipad and pick "open in IBooks" or download it to your computer and email it to yourself and then pick "open in iBooks" from your iPad. Its a spectacular resource on an iPad Pro. If you have an android tablet, go to Google Play and search for "epub reader"