FITNESS FIRST: Fitness apps like Withings and Fitbit were extremely popular this year.
It's been a year of fitness tracking fever. As more and more wearable trackers emerged, so did new functions that tracked much more than steps, giving way to what can be considered wellness tracking in a larger sense. We're taking a look back.
Bolstered by progress made by companies like Withings and Fitbit, who were among the first to offer sleep tracking, this feature became an expectation from wearables in 2014.
