Here is what I am needing to do. I need to find a pdf app that I can make notes on the pdf with and save it and sync back to dropbox app. I have downloaded iannotate pdf and it does let me open the pdf from dropbox to iannotate and make notes on the pdf but I can't figure out how to sync it back to drop box. If someone knows how to do that.. that will be great. If not, if you know of another pdf app that will sync up to dropbox please let me know. Thanks!