2013 was a good year for mobile app developers. Revenues from app development in major app stores reached historical levels, with Android apps doing especially well in Asian markets. Shopping apps were wildly successful with consumers, especially during the ramp-up to the holiday shopping season. Geo-targeted app experiences – ads, push notifications, and location services – made great inroads with app users, even as privacy issues continued to hang overhead. These trends and more were the focus for mobile app development in 2013.