I usually use Preview to read and annotate pdf documents on my Macbook. I wish there was Preview for ios! Is there any good way I can annotate pdf documents on my iphone and synch the files to my Macbook and use a program on my Macbook to annotate (and change the annotations on) the same files? I know I am asking about iphone but I figure there are pdf readers that work on iphone and ipad but maybe no-one uses them much on iphone, so I am asking here! Many thanks!