Long battery life and stylish design combined with improving app software make the Alta HR the best all-around fitness tracker for most people.
The Fitbit Flex 2 doesn't have all of the bells and whistles of other trackers, but it's finally swim-proof, and it does the basics and it does them well.
If you don't need water resistance and GPS, the Fitbit Charge 2 is the best overall fitness tracker you can buy.
While ultimately a more stylish (but heart-rate free) version of the older Charge HR, the Fitbit Alta is a winning fitness tracker with solid style appeal.
Fitbit's first real smartwatch gets a lot of things right, including comfort, features and price, but it's not a slam-dunk design for everyone.
The only GPS-capable Fitbit will appeal to casual runners, but more serious athletes should look elsewhere.
Fitbit's Charge HR combines heart rate tracking, sleep tracking and fitness into an affordable, slim band with good battery life. It's a hard combination to beat.
The Fitbit Charge is a fine replacement for the discontinued Fitbit Force, but you're better off waiting for Fitbit's heart-rate-tracking upgrade.
A long list of features and a comfortable fit make Fitbit’s new Flex the best fitness tracker you can buy.
The Fitbit One is a feature-rich pedometer, but the wristband-style Jawbone Up and Fitbit’s own Flex are more convenient and much better deals.
The Fitbit Zip is still a great entry-level tracker for people that don't want to wear a wristband.
The Ultra extends Fitbit's already impressive personal fitness data measurement abilities, but for the same $99.95 price. Already a high-tech pedometer, the Ultra now has an altimeter to record stairs climbed, too. It isn't as advanced as more expensive mobile fitness gadgets, but the tiny device is easy to wear all day long and fun to use.