A fitness tracker is a device or application that counts steps and measures sleep. Some models also monitor other fitness metrics, including heart rate, temperature, body fat percentage, and blood oxygen level. These devices can be wearable technology or downloadable smart phone applications.
Wearable fitness trackers include the Fitbit, the Misfit Flash, the Jawbone Up Move and the Apple watch. Independent fitness applications include My Fitness Pal and Cycle Meter.
Wearable fitness trackers sync directly to a smartphone or PC so that users can easily access up-to-date data. The applications linked to the wearable trackers provide users with graphs and weekly progress reports. Some trackers allow users to challenge other users and compete with friends around the world to log the most steps. While fitness trackers have received mostly positive reviews, there are some concerns about data collection and privacy rights for users.