Improve Fitness+ sends additional information about your workouts to Apple, including workout titles and trainers, in order to develop, improve and understand the effectiveness of Apple Fitness+ features and workouts. Your data will not be used for any other purpose. This information does not include data from health and activity-related sensors (such as your heart rate, calories or kilojoules). Your Improve Fitness+ data is stored with your other Fitness+ data, against a random identifier that is specific to Apple Fitness+ and not associated with your Apple ID.
You can choose to disable Improve Fitness+ at any time. To do so, go to Settings > Privacy > Analytics & Improvements and tap to turn off Improve Fitness+.
By enabling Improve Fitness+, you agree and consent to Apple’s and its subsidiaries’ and agents’ transmission, collection, maintenance, processing, use and disclosure of this information as described above. Apple may store this information with trusted third-party service providers.