The Charge 2 was one of Fitbit's most popular trackers, so the company stuck with the winning formula with the Charge 3. If you're at all familiar with the Charge 2, you'll notice that not much has changed in the updated device—it's still a rectangular tracker hugged on its short edges by two parts of a band. Fitbit updated the connecting mechanism that lets you switch out the bands on the Charge 3, making it easier to press the black sliver of a button on either end to release the device's current band. The new band snaps right into place without any extra effort.
The new Diesel Full Guard 2.5 has a 47mmx56mm casing which is bigger than most Wear OS watches, and there’s a 1.39-inch display at the center of that. This new refresh of the watch also includes NFC for Google Pay support, a heart rate sensor, and built-in GPS. Diesel also says this watch will last two days on a charge from the 300mAh battery. The watch also has 3ATM water resistance.
Our top pick for most people is the Apple Watch Series 4 with GPS (starting at $399), which has a huge display, ultra-fast processor, Raise to Speak Siri, fall detection and a built-in electrical heart rate sensor for taking on-the-go electrocardiograms. It also runs watchOS 5, which makes the watch even more useful with automatic workout-tracking, offline podcast playback and a Walkie-Talkie voice chat feature.