Frequently Asked Questions
How accurate is Apple Watch heart rate?Wrist HR is +/- 5-10 bpm during steady-state. Less accurate during high-intensity. For accuracy, use chest strap (Polar H10) for workouts.
Is Apple Health my data private?Health data is end-to-end encrypted between your devices via iCloud. Apple cannot read it. Third-party apps need permission to read/write each metric.
Can I share Apple Health with my doctor?Yes — Health app → Sharing → Share with Doctor. Or export data as XML/PDF.
How do I get my hospital records into Apple Health?Health Records — Health app → Browse → Health Records → Add Account → search hospital. Most major US hospitals supported.
Does Apple Watch need iPhone present?For most metrics, no — Apple Watch tracks independently. iPhone needed for sync, calls, music download.
How do I track non-Apple Watch workouts?Manually add: Health app → Browse → Activity → Workouts → "+". Or use connected fitness equipment.
What\'s sleep apnea detection?Series 9+ + Ultra 2 detect breathing disturbances during sleep over 30 days. Result: notification to discuss with doctor + share data.
Can I delete data?Yes — Health app → Browse → metric → tap entry → Delete. Or bulk delete by date range.
What if I have an emergency?Medical ID accessible from lock screen. First responders can see your conditions, allergies, medications, contacts without your passcode.
Does Apple Health work for my fertility tracking?Yes — Cycle Tracking with wrist temperature is approved by FDA for cycle prediction. Better than calendar-only.