RunKeeper Now Harnesses iPhone 5S M7 Muscle

RunKeeper is one of our favorite techy ways to track your athletic activity. The app's latest update, out today, harnesses the power of the M7 chip to turn your iPhone 5S into an always-watching fitness tracker. Like a personal trainer named Siri. » 11/07/13 9:00am 11/07/13 9:00am