All-day heart-rate tracking is a step in the right direction, but the smart features aren't nearly smart enough and the fitness side of the Surge is too basic to justify the higher price.
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.
Fitbit's Charge HR adds heart-rate tracking to an already solid fitness band at a great price, but all the kinks don't feel fully ironed out yet.
The Fitbit Force leaps to the top of the fitness tracker heap, with a bright screen, comfortable fit, and a bevy of slick features.
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 the best fitness tracker you can buy for under $60.
Magellan's new activity tracker can pair with a variety of apps to display information for running, cycling and golfing.
Adidas doubles down on its MiCoach wearable devices, and releases the a heart-rate and fitness tracker known as the Fit Smart.
Pricing not available
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.