Runkeeper is one of the first big-name running apps to offer full watchOS 2 support, which means you can log a run on your Apple Watch even if you leave your iPhone behind.
The Apple Watch’s built-in Workout app has always offered this feature, but it is new for third-party apps. I had never tried it before, but Runkeeper got me curious. So I left my iPhone charging at home, put on a pair of Nikes and went out for a run.

