No, it does not. It's what the application DOES that sells the app. I can almost guarantee you that you would sell more if you didn't have such an ugly (in my opinion) UI. I bought MotionX because it was only $0.99. A few weeks later I stopped using it because I could not stand to look at the UI any longer. Now I'm just back to using the Maps app that comes with the iPhone despite it not having turn-by-turn directions.