Stuart Hall built an App with no domain knowledge. He tells his story of what worked and what didn't to grow a user base of 2.3M users without a single cent spend on marketing.

There is some valuable lessons in here for any App developer or startup, so you can find the full transcript at: http://www.streethawk.com/blog/2015/05/the-secret-to-getting-2-3-million-app-users-with-zero-marketing-spend/