My brother is always calling me with app ideas. One day, way back in late 2003, he suggested writing a calculator that took recipe ingredient amounts and adjusted them by changing the serving size. My husband, our developer, is an avid cook, so the idea intrigued him. He wasn't satisfied with just a multiplier, so he started creating a complicated algorithm for the Palm PDA that would also factor down the result into the simplest amount of steps. So, if you size up a recipe calling for 1-1/2 teaspoon from 4 servings to 14 servings, the little app would tell you “1 Tablespoon and 2-1/4 teaspoons”. He wasn't satisfied with just that, so he displayed the result also converted into metric. Thus Serving Sizer was born and released in February 2004, at the inexpensive price of $9.95. We've since 'ported the app to iOS, both for iPhone and iPad, learning many lessons along the way. Being able to react quickly to market realizations, potential for features, and more, has helped us along the way. This post will cover some of those lessons learned on the road to making Serving Sizer a successful app.