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.

Compare Apple Watch Series 11 prices to find the best current deal.

The Apple Watch Series 11 can function independently, with capabilities varying between GPS and Cellular models.

GPS Model Capabilities

Without your iPhone nearby, the GPS model can:

Works independently:

• Track outdoor workouts with full GPS accuracy
• Play locally stored music and podcasts
• Make Apple Pay contactless payments
• Monitor heart rate and fitness metrics
• Use Compass, Timer, Alarms, and offline apps

Requires iPhone:

• Phone calls and text messages
• Music and podcast streaming
• Internet-connected Siri queries
• Real-time app notifications
• Any data-dependent features

Cellular Model Capabilities

With cellular connectivity, additional independent features include:

• Making and receiving phone calls
• Sending and receiving texts (iMessage and SMS)
• Streaming Apple Music and podcasts
• Getting real-time app notifications
• Using Siri with full internet access
• Emergency SOS via satellite (Series 11 exclusive)

Cellular Model Requirements

• Active carrier plan (approximately $10/month)
• Cellular coverage in your area
• Expect 18-20 hours battery life during active cellular use

Both Models Require iPhone For

• Initial watch setup and pairing
• App installation and updates
• Settings configuration
• Health data synchronization
• watchOS software updates

Neither model can be set up or maintained entirely without an iPhone.

Recommendation

GPS model: Best if your iPhone is typically nearby and you don't need calls or texts during workouts.

Cellular model: Best if you regularly exercise without your phone or want freedom to leave it at home while staying connected.

Compare Apple Watch Series 11 prices to find the best deal on GPS or Cellular models.

The Apple Watch Ultra 3 costs $799 compared to $399 for the Series 11. Here's what that $400 difference provides.

Key Specifications

| Feature | Series 11 | Ultra 3 | |---------|-----------|---------| | Starting price | $399 | $799 | | Case sizes | 42mm, 46mm | 49mm only | | Battery life | 24 hours | 42 hours | | GPS workout time | 8 hours | 14 hours | | Water resistance | 50 meters | 100 meters (dive certified) | | Display brightness | 2,000 nits | 3,000 nits |

Ultra 3 Exclusive Features

• Dual-frequency GPS: Better accuracy in forests and urban environments
• Sapphire crystal display: More scratch-resistant than Ion-X glass
• Emergency siren: 86-decibel alarm
• Action button: Customizable physical button
• Satellite messaging: Emergency communication without cell coverage
• Depth app: Built-in depth gauge for diving

Identical Features on Both

Both watches include:

• Hypertension monitoring (FDA-cleared)
• Sleep apnea detection
• Sleep Score
• ECG and blood oxygen monitoring
• 5G cellular connectivity (cellular models)
• All standard health and fitness tracking

Choose Series 11 If

• You prefer lighter, thinner watches
• Budget is a consideration
• You charge nightly without issue
• Extreme durability isn't necessary
• Standard 50-meter water resistance suffices

Choose Ultra 3 If

• You need multi-day battery for endurance activities
• You're a recreational diver
• You venture into remote areas where satellite SOS matters
• Maximum durability is important
• You want the brightest display available

Recommendation

For most users, the Series 11 delivers all essential smartwatch and health features at half the price. The Ultra 3 serves a specific audience: endurance athletes, divers, and outdoor adventurers who genuinely need its specialized capabilities.

Compare Apple Watch Series 11 prices to find the best current deal.