content: Rating is based on reading PDFs as that is all Ive been using it for. It is much better to read PDF books in this app than it is in Kindle or the default Android PDF reader. It remembers your place and provides a page by page view. It would be nice for the page to be saved to the cloud version as well so that reading across devices is easier. I would also like for the zoom to be saved across pages for PDFs that have small text.