Fitbit surge

This wearable fitness tracker is loaded with bells and whistles－most importantly, GPS tracking. It's also tricked out with a wrist-based heart-rate monitor (no chest strap!), timer, stopwatch, smartwatch features like text and call notifications, and a range of multisport modes to record running, hiking, biking performance and more. Even when battery-draining GPS is activated, the device's longevity is pretty impressive, lasting up to 10 hours on a single charge. The Surge is comfortable to wear, but at a width of more than an inch, it's a bit big－a feature I don't mind when I'm on the track checking split times on the display face. But I could do without the hefty girth from a fashion standpoint. Vanity aside, I love it.