Apple Watch Ultra 4 Technical Specifications
Material and Finish
Titanium case, Grade 5
Natural, Black
Size and Weight
- Height: 49mm
- Width: 44mm
- Depth: 12mm
- 422x514 pixels
- 1,245mm² display area
- Weight (natural): 63.0g
- Weight (black): 63.1g
- Fits 130–210mm wrists
Hardware and Buttons
- Microphone
- Speaker
- Health Sensing System
- Customisable Action button
- Siren/Speaker
- Antennas (GPS, cellular)
- Microphone
- Side button
- Microphone
- Digital Crown
- Depth gauge / Water temperature sensor / Altimeter
Controls
- Customisable Action button
- Digital Crown with haptic feedback
- Side button
- Single tap, double tap and wrist flick gestures
- Siri powered by Apple Intelligence1
Chip
- S11 chip with 64-bit dual-core processor
- 4-core Neural Engine
- 64GB capacity
Apple Intelligence and Siri AI1
The next generation of Apple Intelligence is centred around you, integrated into your apps and built with privacy. Apple Intelligence powers Siri AI — an entirely new version of Siri that’s more personal, conversational and powerful, along with helpful features across apps.
Health and Wellness
- Readiness app
- Vitals app with heart rate, respiratory rate, wrist temperature, blood oxygen and heart rate variability (HRV)4
- Blood Oxygen app2
- ECG app5
- Heart Rate app
- High and low heart rate notifications
- Recovery HRV
- High‑frequency background heart rate tracking
- Irregular rhythm notifications6
- Advanced Cycle Tracking app with fertile window estimates, retrospective ovulation estimates and perimenopause and menopause support7
- Medications app8
- Mindfulness app with state of mind tracking
- Noise app
- Sleep app including sleep stages
- Sleep score
- Sleep apnoea notifications9
Display
- Always‑On Retina display with wide‑angle OLEDs and LTPO3
- 1Hz refresh
- Active area 422x514 pixels, 326 pixels per inch
- Flat sapphire crystal display
- 3,000 nits peak brightness
- 1 nit minimum brightness
- Night Mode for Apple Watch Ultra faces (Modular Ultra, Wayfinder, Orienteering)
Audio
- Three-microphone array with beamforming and wind noise mitigation
- Dual speakers
- Media playback
- Siren
Power and Battery Life
- Multi-day battery life, up to 50 hours of normal use10
- Up to 84 hours in Low Power Mode10
- Up to 18 hours outdoor workout11
- Up to 25 hours Extended Workout11
- Up to 45 hours Max Extended Workout11
- Built‑in rechargeable lithium‑ion battery
- Fast‑charge capable12
- Up to 80% charge in about 45 minutes12
- 15 minutes for up to 18 hours of normal use13
- 5 minutes for up to 10 hours of sleep tracking13
Workouts and Activity
- Custom workouts
- Customisable Workout Views
- Training Load / Workout Effort Tracking
- Heart Rate Zones (customisable)
- Post-workout heart rate
- VO2 max
- Race Route
- Pacer
- Precision Start using Action button
- Cadence, Stride Length, Ground Contact Time, Vertical Oscillation and Running Power
- Multisport workout
- Heart Rate Zone, pace and target alerts
- Compass with bearing, incline, elevation and coordinates
- Custom waypoints
- Automatically generated waypoints to mobile connectivity
- Backtrack GPS data
- Offline maps with custom route creation14
- Elevation alerts
- Topographic maps for thousands of national and regional parks (US only)
- Hundreds of curated hikes across all 63 US national parks
- Siren
- Custom workouts
- Customisable Workout Views
- Training Load / Workout Effort Tracking
- Average speed, elevation gained and distance
- Bluetooth-compatible with power meters
- Functional Threshold Power (with power meter connection)
- Live Activity on iPhone
- Heart Rate Zones (customisable)
- Cadence (rpm), speed (km/h), power (watts), power zones (with power meter connection)
- Post-workout heart rate
- Custom workouts (pool swim) with haptics to cue the next interval
- Customisable Workout Views (pool swim, open water swim)
- Splits and auto sets
- SWOLF score
- Automatic stroke and count detection (including kickboard)
- Water temperature
- Average pace, total distance, heart rate and laps
- Recreational dive to 40m
- Dive computer app (available on the App Store)15
- Automatic launch at 1m
- Current and maximum depth duration
- GPS entry and exit points
- Depth gauge
- Water temperature sensor
More Workouts
Durability
- Water resistance 100m (swim, snorkel, scuba, high-speed water sports) under ISO standard 22810:201018
- Dust resistance IP6X under IEC 6052919
- EN13319 recreational scuba diving to 40m (±1m accuracy)
- Tested to MIL-STD 810H against subsections for altitude, high temperature, low temperature, temperature shock, immersion, freeze with thaw, ice and freezing rain, and shock and vibration
Connectivity
- Model A3579
- Supports RedCap for LTE22
- FDD‑LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71)
- TDD‑LTE (Bands 38, 39, 40, 41, 53)
Accessibility
Built‑in accessibility features supporting vision, mobility, hearing and cognitive disabilities.
- VoiceOver
- Zoom
- On/Off Labels
- Reduce Transparency
- Increase Contrast
- Colour Filters
- Text Size
- Bold Text
- Reduce Motion
- Hourly Chimes
- AssistiveTouch
- Button Click Speed
- Touch Accommodations
- Auto‑Answer Calls
- Type to Siri
- Audio Volume Balance
- Audio Transcription
- Live Speech
- Accessibility Shortcut
- Mono Audio
- Taptic Time
- Personal Voice
- Live Listen
- Sound Recognition
Environmental Requirements
On-wrist operating temperature:
–20° to 55° C
Operating temperature:
0° to 35° C
Non-operating storage temperature:
–20° to 45° C
Dive operating temperature:
0° to 40° C
Relative humidity:
5% to 90% non-condensing
Operating altitude:
–500m to 9,000m
