Comment by sulam

By adding GPS it seems like they're really doubling down on the ~1 day battery life, which is really annoying. And keep in mind it's not actually a full day if you _use_ the thing. For instance I was trying to compare a Fitbit Charge HR and the Apple Watch in terms of how they tracked my heart rate over a hike a couple months ago. It was an 8 mile loop with some good elevation gain -- took me maybe 4 hours. The Apple Watch died 3/4 of the way through the hike despite being fully charged that morning. The Charge HR has lasted 3 and 4 day trips to the Sierras with room to spare, and it's always capturing heart rate, whereas the Apple Watch is really only doing that when I tell it to.