Thanks to a surge in smartwatch shipment volumes, Apple moved past competitors Fitbit and Xiaomi to claim overall leadership for both the quarter and the year.
The Fitbit Ionic is built with an SpO2 sensor -- a pulse oximeter measuring oxygen saturation in the blood -- for tracking health insights such as sleep apnea.
Building on the popularity of its wearable devices, fitness tracker maker Fitbit has introduced two new fitness wristbands -- Fitbit Charge 2 and Fitbit Flex 2.
