First thanks for the comment, now to answer your feedback, the reason I haven't provided the first post yet is because I am still working on it! I expect to have the first post finished by (hopefully) this weekend, and then I will post it on next Monday. I will update the landing page with the blog posts as I post them also so future visitors can see some of the content/all of the content before deciding to sign up. I hope this provides an understandable excuse!
Are you considering revamping the UI to match with Material Design soon? Also It might be worth while adding a onboarding experience before the user is set up in the app. This would allow you to explain the buttons at the bottom better (speaking of which it might be better to use two different icons, like change the one on the right to a "reply arrow" or something like forwarding so the user knows that the button means they will re-ask the question).
Libraries. How can the idea of the public library extent properly into the 21st century? Sure there are solutions such as Oyster and Scribd, but they would be considered private libraries that you pay subscription fees for, how can you scale a library to remain free without DRM traps in this day and age?