Major League Baseball will be using Apple's new iBeacon microlocation APIs in iOS 7 to enhance its MLB.com At the Ballpark app to create customized and interactive experiences for fans at its teams' stadiums, according to a new report by Mashable."We've been looking at customizing the app based on where you are within the stadium, but GPS is notorious for not working indoors, especially when you are in a building made of steel," Marc Abramson, iOS developer for MLB, told Mashable. "Instead, we are incorporating Apple's new Bluetooth and iBeacon technologies for iOS 7 and couldn't be more excited about the potential."