If you can't explain your app in fewer than 5 words, do you think your users will ever bother telling anyone about the app? Before you have product-market fit, product development is not about "adding features"—but distilling a product to a simple marketable sentence. Adding features more often impairs growth.

Nikita Biertwitter.com
Noah Kaganx.com
Raphael Schaadx.com

Ash Maurya Running Lean: Iterate from Plan A to a Plan That Works (Lean (O'Reilly))