invite users with a PIN rather than email
I am an educator and I see a lot of potential in this app. The teacher can create video tutorials and share them with students. However, many k-12 schools in the US do not provide emails for students. It would be much more convenient if the student could access the teacher's Vialogues with a PIN that the teacher shares with the students. Edmodo and Ask3 (from TechSmith) have adopted this approach and it is much more convenient for all involved.
Thanks for your attention.