Of course we cannot blame Martin devs for not updating their application, we have to blame Apple to not to give the possibility of paid updates.
However, I would happily paid a subscription fee to enable sync across devices (for example) as a matter of support app. I purchased the "color customization" for the same reason, and I purchase first iPhone, first iPad and then Universal app...
PS: Sorry for my words about "misunderstanding", I'm Spanish talking and sometimes seriously mistake English meaning. My intention was to say "I don like read plain text ebooks in iPad Pro" instead of saying you are wrong or so.
