Plays well with the Health app.

Writes to HealthKit's sexual activity category only when you opt in. Heart rate samples from the Watch are saved alongside each record, so you can look back at the shape of a session, not just its timestamp.

• Opt-in HealthKit sync, off by default
• Workouts from the Watch can save to Apple Fitness
• Do only writes — it never reads your Health data
• All writes are tagged so you can clean them up any time

See also: Apple Watch · Privacy-first