In this Mobile Engagement Podcast episode, Stuart Argue. Stuart comes from Walmart and was a driver in several mobile applications including "Savings Catcher" - Walmart's breakout success application. Walmart also partnered with American Express to provide double-rewards for shoppers using Savings Catcher.
In this podcast, Stuart covers the history, user experience and the challenges of massive scale.
A transcript of the podcast is at http://streethawk.com/blog/2015/01/podcast-app-engagement-to-millions-users-walmart-savings-catcher/