What happens after someone downloads your app? Most likely, that user stops opening up your app. User engagement is one of the biggest hurdles in growing your mobile app, but gamification is an approach that seeks to buck the trend of decreasing app activity. Gamification—making the experience like a game—is what fuels mayorships in foursquare or badges in Gowalla. The newest and most popular apps gamify their social connections, rewarding their users for their activity and challenging them to keep up with the app. It makes the mobile experience more dynamic and interactive, so where will this trend go as mobile continues to take off? What are the big gamified apps on the horizon, and more interestingly, how will this play out as the mobile experience becomes a more social experience?