Old habits are sometimes hard to break. I like being able to access a PDF online in case something happens to my electronic copy.
About the online app. I bet it isn't in reality. I am a computer guy, but I can't stand the looks of that online app. I like the PDF app, you can type into it, pretty clean.
As for the electronic app. If someting happens to your copy, can't you just ask the carrier to furnish you with another copy?