Comfortable, sleek, mid-priced, and with great sleep features, the Jawbone UP24 could be the activity tracker for you, as long as you don't mind mobile-only access to your data, and a few other downsides.

Jawbone's UP24 wristband, app, and data system originally launched on iOS, but are now available on Android.

The $199 device has integrated sensors for immediate readings of key vitals.

Garmin's Vivofit activity tracker makes a few trade-offs to balance features, style, and ease of use into a mid-priced device. The results will appeal to a certain crowd, but not everyone.

After "a flurry of wearable electronics launches" at Mobile World Congress this week, NPD Display Search said it is now tracking unit shipments in the nascent wearables market.

In Barcelona this week, the likes of Qualcomm, Intel, MediaTek, Nvidia, and Broadcom gave us a good look at the mobile platforms they'll be pushing throughout 2014 and beyond.

The Jawbone UP tracks personal health and fitness very thoroughly in a stellar mobile app for iOS and Android, but it's not the best fitness tracker we've tested. A few unique features do give it special appeal, though.

The retro-chic fitness-tracking Nike+ FuelBand looks like an understated gadget, and in fact, it is. The data it collects is very limited, making it little more than a glorified pedometer.

Fitbit Ultra is a sleek, sturdy, and affordable device that can help you monitor your general physical activity level. It's supremely well suited for casual users, but not serious athletes.

Motorola's MotoActv cleverly correlates and displays data from your workouts, such as the map of your route and your pace during each song on your playlist. Among hybrid music player-fitness tracking devices, though, it's on the pricier side.

The Nike+ SportWatch GPS builds all of Nike's popular running software into a watch with TomTom GPS technology inside, allowing you to track and monitor your workouts from your wrist. But many runners will be better off with an iPod and a Nike+ Sport Kit, which provide much of the same functionality for less money.