An inside look into one developer's sales numbers

John Casasanta from Tap Tap Tap, the maker of Tipulator and Where To? has written an incredible post describing his application's sales numbers. I encourage every developer to check it out. John includes the amount Tap Tap Tap has spent on marketing and how that affected his sales, as well as some background on why he has decided to share this information. Mad props to John and Tap Tap Tap for sharing this.