I feel bad about having only just heard of this app. Apparently, it’s been a best seller since the arrival of the iPad but it’s new to me so I still feel the need to rave about it! As a PDF document management tool, it’s brilliant. I use it to display and discuss price lists, brochures and presentations with customers, enabling me to carry everything I need and have near-instant access in any meeting. Even better is the way it synchronises documents with my Dropbox (and other sources) and enables me to email files in a few clicks.