Apple Watch Ultra 4 Technical Specifications

Material and Finish

Titanium case, Grade 5

Natural, Black

Size and Weight
  • Height: 49 mm
  • Width: 44 mm
  • Depth: 12 mm
  • 422x514 pixels
  • 1,245 mm² display area
  • Weight (natural): 63.0 g
  • Weight (black): 63.1 g
  • Fits 130–210 mm 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
  • Audio Intelligence (Live Rewind, Siri Recap, Shazam, Sound Recognition)2
  • 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.

Learn more

Sensors
  • Health Sensing System: third‑generation electrical heart sensor, always‑on optical heart sensor, blood oxygen sensor,3 temperature sensor4
  • Depth gauge
  • Water temperature sensor
  • Compass
  • Always‑on altimeter
  • High‑g accelerometer
  • High-dynamic-range gyroscope
  • Ambient light sensor
Health and Wellness
  • Readiness app
  • Vitals app with heart rate, respiratory rate, wrist temperature, blood oxygen, 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 apnoea 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

Learn more

Operating System
  • watchOS
  • watchOS is the world’s most advanced wearable operating system, with apps and features designed to keep you active, healthy, safe and connected.
Workouts and Activity
Running
  • 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

Hiking
  • 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

Cycling
  • 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

Swimming
  • 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

Diving
  • Recreational dive to 40 m
  • Dive computer app (available on the App Store)16
  • Automatic launch at 1 m
  • Current and maximum depth duration
  • GPS entry and exit points
  • Depth gauge
  • Water temperature sensor

More Workouts
Safety
  • Emergency SOS17
  • International emergency calling18
  • Siren
  • Torch
  • Fall Detection17
  • Crash Detection17
  • Last Emergency Call Availability Waypoint
  • Noise monitoring
  • Backtrack
  • Check In
Durability
  • Water resistance 100 m (swim, snorkel, scuba, high-speed water sports) under ISO standard 22810:201019
  • Dust resistance IP6X under IEC 6052920
  • EN13319 recreational scuba diving to 40 m (±1 m 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 chip21

  • GymKit
  • Model A3579
  • Supports RedCap for 5G22 and 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)

  • Support for Apple Watch For Your Kids24
  • International roaming25
Accessibility

Built‑in accessibility features supporting vision, mobility, hearing and cognitive disabilities.

Learn more

Features include:
  • 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 m (–1,600 to 29,500 ft)

Apple Watch
and the Environment

See the Apple Watch Ultra 4 Product Environmental Report (PDF)

Progress towards Apple 2030

Apple 2030 is our goal to be carbon neutral across our value chain. We design our products to be less carbon intensive by prioritising the use of recycled and renewable content and low‑carbon materials while focusing on the energy efficiency of our software and hardware.

See Apple’s commitment

Materials

Apple Watch Ultra 4 is made with 45% recycled content,26 including:

  • 100% recycled cobalt in the battery
  • 100% recycled copper wire and recycled tungsten in the Taptic Engine
  • 100% recycled gold plating and tin solder in all Apple‑designed printed circuit boards
  • 95% recycled lithium in the battery
  • 80% recycled steel in the battery enclosure and Taptic Engine components
  • 100% recycled titanium in the case

Packaging

100% fibre‑based packaging27

Energy

  • 100% of manufacturing electricity for Apple Watch Ultra 4 is sourced from renewable electricity28
  • 100% of expected customer energy use matched with renewable electricity29

Waste

No established final assembly sites generate waste sent to landfill as part of Apple’s Zero Waste Programme30

Smarter chemistry31

All of the materials used in Apple products, accessories and packaging are covered by the requirements of our Regulated Substances Specification, which was one of the first in industry to restrict the use of key substances of concern. See the latest Environmental Progress Report to understand Apple’s recent efforts in phasing out these chemistries.

Compatibility
  • iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 27 or later
In the Box
  • Apple Watch Ultra 4
  • Strap
  • Apple Watch Magnetic Fast Charger to USB‑C Cable (1 m)
Apple Watch Ultra 4, natural titanium colour case, edge-to-edge display, translucent grey Ocean Band, Apple Watch Magnetic Fast Charger to USB-C Cable