Fitbit Charge

The company is also adding more content to its Fitbit Premium subscription service.

The Cedars-Sinai study used Fitbit Charge trackers to monitor 100 patients following a major inpatient surgical procedure.

Fitbit Surge Fitbit sold 4.

One of the first companies in the connected fitness wearables market, San Francisco-based Fitbit, has registered for an initial public offering.

Misfit Flash, one of the devices that will be used in the study.

Just a week after news leaked about activity tracker maker Fitbit's next generation of devices, the company has announced its three new trackers -- Charge, Charge HR, and Surge.

Fitbit Force This week there's a new report about leaked details of an upcoming Fitbit device -- this is the third device that has leaked from Fitbit in recent weeks -- The Verge reports that the Fitbit Surge will cost about $250 and will offer GPS-enabled distance tracking, heart rate sensing, and call and text message notifications.

According to a report in Re/Code, Apple will stop selling Fitbit products in Apple stores in the near future.

Fitbit Force Details and images of two upcoming Fitbit activity tracker devices, called Charge and Charge HR, have leaked, according to a report from Gizmodo.