Hautelook is a flash sale site, selling women's ready-to-wear clothing in short, high-markdown sales at 8:00 am. The app was responsible for 6 million per month in retail sales.
I developed for 3 major releases of the HauteLook iPhone and iPad apps, including a Local Notifications engine to handle the challenge of sending notifications to 100K+ users at exactly 8:00 am every morning.