Oh interesting! I don't have an iPad but I would imagine that the cover image would show up differently on different devices because of resolution and maybe other factors. I'll have to do some research about the appropriate size for these headers. Thank you!

Day 4 out :) https://steemit.com/steemit-help/@stevecronin/7-days-to-a-better-steemit-blog-day-4-how-to-use-thumbnails-effectively