What the new Noble metal process will mean for you

Now Playing: The best apps for getting the most out of your Apple WatchNow Playing: Apple Watch Series 3: The first look at Apple Watch 3Now Playing, 3Now The Apple Watch, and the future of fitness Now Playing, 5Now Watch: The most exciting Apple Watch features yetNow Playing Watch: iPhone 7s and 7s Plus are hereNow Playing The best Apple Watch appsNow Playing Apple Watch: A new generation of watches for 2017Now Playing