What a user will do at their computer will often be different than what they do on a mobile application for the same application. It can be hard to predict even if you do ask your users what they think they would use on a mobile application.
ick. I don't love the send workflow. Lets say I send I need to send a course override form to my academic advisor and she opens the document and all of a sudden has a "hellosign" account? That download link is a little misleading.