08/01/2009 05:12 am ET Updated May 25, 2011

11-Year-Old Builds Top-Selling iPhone App

Owen Voorhees may seem like an unlikely tech entrepreneur because he's just 11-years old. But for the last nine months he climbed a mountain of doubt, overcame unfamiliar programming languages and poured over college level computer science textbooks--all to develop his very own iPhone application. Last month, his app, MathTime, debuted in the App Store and quickly rose to No. 13 in the paid, educational apps section.