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The Apple Watch Series 11 includes Apple's most comprehensive health monitoring capabilities, with several features new to this generation.
Heart Health Monitoring
- ECG: Single-lead electrocardiogram for atrial fibrillation detection
- Heart Rate: Continuous monitoring with 3rd-generation optical sensor
- Irregular Rhythm: Passive background monitoring for atrial fibrillation
- Alerts: High and low heart rate notifications when thresholds are exceeded
- Cardio Fitness: VO2 max estimation for fitness level tracking
Blood Pressure Screening (New)
The FDA-cleared hypertension notification system analyzes blood vessel responses:
- Monitors passively in background using photoplethysmography
- Reviews patterns over 30-day periods
- Alerts when signs suggest possible undiagnosed hypertension
- Screening tool only (does not provide blood pressure readings)
- Available only for users without existing hypertension diagnosis
Sleep Tracking
- Sleep Score (New): 0-100 rating based on duration, consistency, and interruptions
- Sleep Stages: Tracks REM, Core, and Deep sleep throughout the night
- Sleep Apnea Detection: Monitors breathing patterns and notifies of potential issues
- Respiratory Rate: Tracks breaths per minute during sleep
Blood Oxygen Monitoring
- Periodic background measurements throughout the day
- On-demand readings via Blood Oxygen app
- Measures SpO2 saturation levels (70-100% range)
Temperature Sensing
- Wrist temperature sensor takes readings during sleep
- Supports menstrual cycle tracking with ovulation estimates
- Can indicate elevated temperatures suggesting illness
- Tracks baseline temperature variations over time
Safety Features
- Fall Detection: Detects hard falls, auto-calls emergency services if no response
- Crash Detection: Identifies severe car crashes
- Emergency SOS: Quick access to emergency services
- Satellite SOS: Emergency contact without cell coverage (cellular models only)
Additional Features
- Vitals App: Overnight dashboard of key health metrics
- Cycle Tracking: Period prediction, ovulation estimates, fertility windows
- Medication Tracking: Reminders and logging
- Mental Health: Mood logging and mindfulness exercises
- Noise Monitoring: Alerts when environmental noise may damage hearing
All health data syncs to the iPhone Health app for long-term tracking and healthcare provider sharing.
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How we researched this
Where this comes from: this answer draws on the product's published specifications and the reviews ShopSavvy collected for it, alongside prices from 1 retailer in ShopSavvy's price data, most recently seen Aug 19, 2026.
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