I'm sort of looking for a PDF reader that works with the cloud, so that I can open them on both my iPhone and MacBook. Right now, I am using my MacBook's preview to read and highlight sections in each PDF. And I would like to view those highlighted sections on my iPhone. I read through the App Store, but I don't think I found anything. I did see PDF Expert 5. However, I do not know if my highlights or edits transfer back and forth. Also, I have heard you have to go to a hidden folder to view files? Anyone has experience on this app? Really appreciate the help!