Apple Watch Ultra 4 Technical Specifications
Material and Finish
Titanium case, Grade 5
Natural, Black
Size and Weight
- Height: 49mm
- Width: 44mm
- Depth: 12mm
- 422 by 514 pixels
- 1245 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
- Customizable Action button
- Siren/Speaker
- Antennas (GPS, cellular)
- Microphone
- Side button
- Microphone
- Digital Crown
- Depth gauge/Water temperature sensor/Altimeter
Controls
- Customizable 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
- Audio Intelligence (Live Rewind, Siri Recap, Shazam, Sound Recognition)2
- 4‑core Neural Engine
- 64GB capacity
The next generation of Apple Intelligence is centered 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, sleep duration, and heart rate variability (HRV)5
- Blood Oxygen app3
- ECG app6
- Heart Rate app
- High and low heart rate notifications
- Recovery HRV
- High‑frequency background heart rate tracking
- Irregular rhythm notifications7
- Advanced Cycle Tracking app with fertile window estimates, retrospective ovulation estimates, and perimenopause and menopause support8
- Medications app9
- Mindfulness app with state of mind tracking
- Noise app
- Sleep app including sleep stages
- Sleep score
- Sleep apnea notifications10
- Hypertension notifications11
Display
- Always‑On Retina display with wide‑angle OLEDs and LTPO3
- 1Hz refresh
- Active area 422 by 514 pixels, 326 pixels per inch
- Flat sapphire crystal display
- 3000 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
- Multiday battery life, up to 50 hours of normal use12
- Up to 84 hours in Low Power Mode12
- Up to 18 hours outdoor workout13
- Up to 25 hours Extended Workout13
- Up to 45 hours Max Extended Workout13
- Built‑in rechargeable lithium‑ion battery
- Fast‑charge capable14
- Up to 80% charge in about 45 minutes14
- 15 minutes for up to 18 hours of normal use15
- 5 minutes for up to 10 hours of sleep tracking15
Workouts and Activity
- Custom workouts
- Customizable Workout Views
- Training Load / Workout Effort Tracking
- Heart Rate Zones (customizable)
- Postworkout 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 creation16
- Elevation alerts
- Topographic maps for thousands of national and regional parks (U.S. only)
- Hundreds of curated hikes across all 63 U.S. national parks
- Siren
- Custom workouts
- Customizable 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 (customizable)
- Cadence (rpm), speed (mph), power (watts), power zones (with power meter connection)
- Postworkout heart rate
- Custom workouts (pool swim) with haptics to cue the next interval
- Customizable 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)17
- 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
- All models
- Support for 2.4GHz and 5GHz Wi‑Fi networks
- Wi‑Fi 4 (802.11n)
- Bluetooth 5.3
- Precision dual‑frequency GPS (GPS, Galileo, QZSS, and BeiDou)
- Second‑generation Ultra Wideband chip22
- Apple Pay
- GymKit
- Model A3579
- LTE23
- FDD‑5G NR (Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71)
- TDD‑5G NR (Bands n38, n40, n41, n53)
- 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
- Color Filters
- Text Size
- Bold Text
- Reduce Motion
- Hourly Chimes
- AssistiveTouch
- Button Click Speed
- Touch Accommodations
- Auto‑Answer Calls
- 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:
–4° to 130° F (–20° to 55° C)
Operating temperature:
32° to 95° F (0° to 35° C)
Non‑operating storage temperature:
–4° to 113° F (–20° to 45° C)
Dive operating temperature:
32° to 104° F (0° to 40° C)
Relative humidity:
5% to 90% noncondensing
Operating altitude:
–1600 feet to 29,500 feet (–500m to 9000m)
