The Oppo Find X8 series has adopted the Fitbit app as its primary fitness application, moving away from Google Fit. This marks the first time a non-Pixel Google smartphone features Fitbit in this capacity. Users can transition their data from Google Fit to Fitbit using Google's Health Connect service. New features for Fitbit, including an AI health coach and an AI-driven Sleep Journal, are in development, with potential availability by the end of the year.