Fitbit Flex

Fitbit Flex

There are more wearable fitness trackers available today than there are bottled-water brands. Many of them are quirky and unreliable, but the Fitbit Flex proves accurate and simple to use. The water-resistant band is the only one of its kind to track steps taken, distance traveled, and sleep patterns while wirelessly uploading the information to smart devices. [$100; fitbit.com]