[coreymaass]

You could spend a lot of time learning to build, and then building, the basic functionality a web app - user registration, sign in, sending transactional emails, etc. - before you even get to to the core functionality of your idea. If you want to launch a web app as quickly as possible, specifically to test the functionality that will make your app different, that's a different path. Either is fine. I just know that I've fallen into the trap before of not deciding on my own motivations before jumping in head first.