I've been trying out the Sync app, and whilst overall it is quite good there are two things that are really annoying. For some reason it shows most pictures really big, so it takes up most of the screen but only shows the edge, not the full picture. Plus the line break
doesn't work. So if you'e on Sync you would just see a \ where there is supposed to be a new line. Very bad for poetry and lists.

Jerboa also has some giant pictures and does not allow the split screen view I like, but I have just discovered animated gifs don't work there so that is one big bonus. Still waiting for an app that fully suits me, but we're getting closer.