@Wildlavander I know you weren't asking me, but I thought I should answer anyways. Watt pad has a covers app creater, but I'm not really a big fan of it. I use befunky a free app that lets you edit and add text and a bunch of other things. If you want to overlay two images I really like using piclay. I haven't used photonova2 yet, but it has a lasso tool which I think will be useful in editing. Anyways hope that helped!