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
- 1,245 sq mm display area
- Weight (natural): 63.0 grams
- Weight (black): 63.1 grams
- Fits 130–210mm wrists
Hardware and Buttons
- Microphone
- Speaker
- Health Sensing System
- Customisable Action button
- Siren/Speaker
- Antennas (GPS, cellular/satellite)
- 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
Chip
- S11 chip with 64-bit dual-core processor
- 4‑core Neural Engine
- 64GB capacity
Apple Intelligence1
The next generation of Apple Intelligence is centred around you, integrated into your apps and built with privacy.
Health and Wellness
- Readiness app
- Vitals app with heart rate, respiratory rate, wrist temperature, blood oxygen, sleep duration 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
- Hypertension notifications10
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 use11
- Up to 84 hours in Low Power Mode11
- Up to 18 hours outdoor workout12
- Up to 25 hours Extended Workout12
- Up to 45 hours Max Extended Workout12
- Built‑in rechargeable lithium‑ion battery
- Fast‑charge capable13
- Up to 80% charge in about 45 minutes13
- 15 minutes for up to 18 hours of normal use14
- 5 minutes for up to 10 hours of sleep tracking14
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 cellular connectivity
- Backtrack GPS data
- Offline maps with custom route creation15
- 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 (mph), 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 lengths
- Recreational dive to 40m
- Dive computer app (available on the App Store)16
- 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 22810:201020
- Dust resistance IP6X under IEC 6052921
- 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
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
- RTT Support
- 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 (–4° to 130° F)
Operating temperature:
0° to 35° C (32° to 95° F)
Non-operating storage temperature:
–20° to 45° C (–4° to 113° F)
Dive operating temperature:
0° to 40° C (32° to 104° F)
Relative humidity:
5% to 90% non‑condensing
Operating altitude:
–500 to 9,000 metres (–1,600 to 29,500 feet)
