Apple Watch Ultra 4

Apple Watch Ultra 4 - Tech Specs

Year introduced: 2026

Material and Finish

Titanium case, Grade 5

  • Natural

  • Black

Size and Weight

  • Height: 49 mm

  • Width: 44 mm

  • Depth: 12 mm

  • 422 by 514 pixels

  • 1,245-sq-mm display area

  • Weight (natural): 63.0 grams

  • Weight (black): 63.1 grams

  • Fits 130–210-mm wrists

Hardware and Buttons

  • Microphone

  • Speaker

  • Health Sensing System

  • Customisable Action button

  • Siren/Speaker

  • Antennas (GPS, cellular, satellite)

  • Side button

  • 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 about Apple Intelligence and Siri AI

Sensors

  • Health Sensing System: second‑generation electrical heart sensor, always‑on optical heart sensor, blood oxygen sensor3 and 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 422 by 514 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

  • Multiday 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 about Power and Battery Life

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

  • Customised 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

  • Automatic track detection

  • Multisport workout

  • Heart Rate Zone, pace and target alerts

  • Hiking

  • Compass with bearing, incline, elevation and coordinates

  • Customised waypoints

  • Automatically generated waypoints to mobile connectivity

  • Backtrack GPS data

  • Offline maps with customised route creation15

  • Elevation alerts

  • Siren

  • Cycling

  • Customised 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 (kph), power (watts), power zones (with power meter connection)

  • Post-workout heart rate

  • Swimming

  • Customised 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

  • Alpine Skiing

  • Snowboarding

  • Outdoor Rowing

  • Paddlesports

  • Golf

  • Outdoor Walk

  • Cross Trainer

  • Indoor Rowing

  • Stepper

  • High Intensity Interval Training

  • Yoga

  • Functional Strength Training

  • Dance

  • Cool Down

  • Core Exercise

  • Pilates

  • Tai Chi

  • Wheelchair

  • Kickboxing

  • Multisport

  • and more

Safety

  • Satellite communications (Emergency SOS, Find My)17

  • Emergency SOS18

  • International emergency calling19

  • Siren

  • Torch

  • Fall Detection18

  • Crash Detection18

  • 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 22810:201020

  • Dust resistance IP6X under IEC 6052921

  • EN13319 recreational scuba diving to 40m (±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 chip22

  • Apple Pay23

  • GymKit

Model A3579

  • Supports RedCap for 5G24 and LTE25

  • 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 Kids26

Accessibility

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

Learn more about Accessibility

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% noncondensing

  • Operating altitude: –500 m to 9,000 m (–1,600 feet to 29,500 feet)

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 content27, 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 packaging28

Energy

  • 100% of manufacturing electricity for Apple Watch Ultra 4 is sourced from renewable electricity29

  • 100% of expected customer energy use matched with renewable electricity30

Waste

  • No established final assembly sites generate waste sent to landfill as part of Apple’s Zero Waste Program31

Smarter chemistry32

  • 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

  • Band

  • Apple Watch Magnetic Fast Charger to USB‑C Cable (1 m)

  1. Apple Intelligence is available with Siri and device language set to Chinese (Simplified), Chinese (Traditional), Danish, Dutch, English, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Spanish, Swedish, Turkish or Vietnamese. Some features may not be available in all regions or languages. Some devices may not be available in all regions. Siri AI is available in beta in watchOS 27 and requires an Apple Intelligence–enabled device set to a supported language. Available in English to start. Siri AI will not be initially available in the EU on watchOS. Certain Apple Intelligence features that rely on server‑side models are subject to daily usage limits, including but not limited to Siri AI. Daily limits may vary by feature, request complexity, system demand, system policies and other factors. Expanded access to such features will be available for a fee in the future. Use of these features is subject to the Apple Intelligence Terms and Conditions. Learn more at apple.com/au/apple-intelligence.

  2. Audio intelligence includes Live Rewind, Siri Recap, Sound Recognition and faster Shazam, and requires Apple Watch Series 12 or Apple Watch Ultra 4. Live Rewind and Siri Recap will be available in beta in late 2026 and require an Apple Intelligence–enabled iPhone 16 or later (excluding iPhone 16e). Will be available in English to start and will not initially be available in the EU. Certain Audio Intelligence features that rely on server‑side models are subject to daily usage limits, including but not limited to Live Rewind and Siri Recap. For more information, visit support.apple.com/en-au/148354.

  3. The Blood Oxygen app is for wellness purposes only and not for medical use.

  4. The temperature sensing feature is not intended for medical use. Temperature sensing is available on Apple Watch Series 8 and later, Apple Watch SE 3 and all Apple Watch Ultra models.

  5. The Vitals app is for wellness purposes only and not for medical use.

  6. The ECG app is available on Apple Watch Series 4 and later (excluding Apple Watch SE models) and all Apple Watch Ultra models, and can generate an ECG similar to a single‑lead electrocardiogram. Intended for use by people 22 years old and over. Always follow directions for use. The device is not intended to replace traditional methods of diagnosis. Consult a doctor if atrial fibrillation is detected or if you have symptoms of a heart attack, stroke or other cardiovascular conditions.

  7. Irregular rhythm notification requires the latest version of watchOS and iOS. It is not intended for use by people under 22 years old or those who have been previously diagnosed with atrial fibrillation (AFib). Always follow directions for use. The device is not intended to replace traditional methods of diagnosis. Consult a doctor if atrial fibrillation is detected or if you have symptoms of a heart attack, stroke or other cardiovascular conditions.

  8. The Cycle Tracking app should not be used for birth control or to diagnose a health condition. Cycle deviation notifications are based solely on the user’s logged cycle history. Cycle deviation notifications inclusive of perimenopause are for people 40 years old or older. These notifications are not intended to replace traditional methods of diagnosis, monitoring or treatment of perimenopause or menopause.

  9. The Medications feature should not be used as a substitute for professional medical judgment. Additional information is available on the labels of your medications, but please consult your healthcare provider prior to making any decisions related to your health.

  10. Sleep apnoea notifications are available on Apple Watch Series 9 and later, Ultra 2 and later, and SE 3. The feature is intended to detect signs of moderate to severe sleep apnoea for people aged 18 years or older without a diagnosis of sleep apnoea. Always follow directions for use. The feature is not intended for use in screening for, diagnosing, treating or managing sleep apnoea. Even without a notification, sleep apnoea may still be present. Consult a medical practitioner if you have symptoms of sleep apnoea, or any other breathing disturbance.

  11. Multi‑day battery life testing includes: 630 time checks, 190 notifications, 30 minutes of app use, two 60‑minute workouts with music playback from Apple Watch via Bluetooth®, and 12 hours of sleep tracking over the course of 50 hours; Apple Watch Ultra 4 usage includes a total of 10 hours of mobile network connection and 40 hours of connection to iPhone via Bluetooth over the course of 50 hours. Battery life testing in Low Power Mode includes: 1100 time checks, 330 notifications, 55 minutes of app use, two 60‑minute workouts with music playback from Apple Watch via Bluetooth, and 18 hours of sleep tracking over the course of 84 hours; Apple Watch Ultra 4 usage includes on‑demand mobile network connection and 68 hours of connection to iPhone via Bluetooth over the course of 84 hours. Testing conducted by Apple in July and August 2026 using preproduction Apple Watch Ultra 4 paired with an iPhone; all devices tested with prerelease software. Battery life varies by use, configuration, mobile network, signal strength and many other factors; actual results will vary.

  12. Workout tested without iPhone and with heart rate sensor on during outdoor run workout sessions. Extended Workout turns on Low Power Mode during the workout; running form metrics will be unavailable. Max Extended Workout turns on Low Power Mode during the workout, and turns off alerts and splits; certain metrics will be unavailable. Testing conducted by Apple in July and August 2026 using preproduction Apple Watch Ultra 4; all devices tested with prerelease software. Battery life varies by use, configuration, mobile network, signal strength and many other factors; actual results will vary.

  13. Charge times are from 0–80% and 0–100% using the included Apple Watch Magnetic Fast Charger to USB‑C Cable. Testing conducted by Apple in July and August 2026 using preproduction Apple Watch Ultra 4 paired with an iPhone; all devices tested with prerelease software, preproduction Apple Watch Magnetic Fast Charger to USB‑C Cable (Model A3277) and Apple 20W USB‑C Power Adapter (Model A2305). Charge time varies with adapter, region, settings, initial battery levels, usage and environmental factors; actual results will vary.

  14. Testing conducted by Apple in July and August 2026 using preproduction Apple Watch Ultra 4 paired with an iPhone; all devices tested with prerelease software, preproduction Apple Watch Magnetic Fast Charger to USB‑C Cable (Model A3277) and Apple 20W USB‑C Power Adapter (Model A2305). Charge time varies with adapter, region, settings, initial battery levels, usage and environmental factors; actual results will vary.

  15. Offline Maps is available for Apple Watch Series 6 and later, Apple Watch SE 2 and later, and all Apple Watch Ultra models running watchOS 26 or later. Requires iPhone 11 or later running iOS 26 or later. Not available in all countries and regions.

  16. A subscription is required for Oceanic+. Available on the App Store. Apple Watch Series 10 and later support snorkelling to 6 metres; Apple Watch Ultra models support recreational scuba diving to 40 metres. Always follow diving protocols, dive with a companion and have a secondary device.

  17. Emergency SOS and Find My via satellite are included for free for two years with the activation of Apple Watch Ultra 3 or later. Connection and response times vary based on location, site conditions and other factors. Find My via satellite requires a carrier plan. Satellite connectivity is provided by Globalstar and its affiliates. See support.apple.com/en-au/123924 for more information.

  18. Emergency SOS requires a satellite connection, mobile network connection or Wi‑Fi calling with an internet connection from your Apple Watch or nearby iPhone. You can use cellular models of Apple Watch to make an emergency call in many locations, provided that a mobile network is available. Some mobile networks may not accept an emergency call from your Apple Watch if your Apple Watch isn’t activated, if it isn’t compatible with or configured to operate on a particular mobile network, if it isn’t set up for mobile service or if the mobile network does not support emergency calling over IMS. See support.apple.com/en-au/108374 and apple.com/au/watch/cellular for more information.

  19. International emergency calling requires an Apple Watch Series 5 (GPS + Cellular) or later, Apple Watch SE (GPS + Cellular) or later, or Apple Watch Ultra or later. For a list of supported countries and regions, see apple.com/au/watchos/feature-availability.

  20. Apple Watch Ultra 4 has a water resistance rating of 100 metres under ISO standard 22810:2010. It may be used for recreational scuba diving (with compatible third‑party app from the App Store) to 40 metres and high‑speed water sports. It should not be used below 40 metres. Water resistance is not a permanent condition and can diminish over time. For more information, see support.apple.com/en-au/109522.

  21. Apple Watch Ultra 4 is rated IP6X dust-resistant.

  22. Ultra Wideband availability varies by region. For more information, visit support.apple.com/en-au/109512.

  23. To use Apple Pay you need a supported card from a participating card issuer. To check if your card is compatible with Apple Pay, contact your card issuer. Apple Pay is not available in all markets. View Apple Pay countries and regions.

  24. Data plan required. 5G is available in selected markets and through selected carriers. Speeds vary based on site conditions and carrier. For details on 5G support, contact your carrier and see apple.com/au/watch/cellular.

  25. Carrier plan required for cellular service. Contact your service provider for more details. Connection may vary based on network availability. International roaming is not supported. Check apple.com/au/watch/cellular for participating carriers and eligibility. See support.apple.com/en-au/HT207578 for additional setup instructions.

  26. Not all features will be available if the Apple Watch is set up through Apple Watch For Your Kids. Check support.apple.com/en-au/109036 for details. Carrier plan required for cellular service. Check apple.com/au/watch/cellular for participating carriers and eligibility.

  27. Product recycled or renewable content is the mass of certified recycled material relative to the overall mass of the device, not including packaging or in‑box accessories. Recycled and renewable plastic content calculation includes mass balance allocation.

  28. Breakdown of US retail packaging by weight. Adhesives, inks and coatings are excluded from our calculations of plastic content and packaging weight. Fibre sourcing requirements are defined in Apple’s Responsible Fiber Specification. We consider wood fibres to include bamboo.

  29. We use a mix of supplier and Apple renewable energy projects when sourcing our manufacturing electricity.

  30. Apple is matching 100% of expected electricity consumption for product use with renewable electricity.

  31. All established final assembly supplier sites — those that have been Apple suppliers for more than one year — for Apple Watch Ultra 4 are third‑party verified as Zero Waste by UL LLC (UL 2799 Standard). UL requires at least 90% diversion through methods other than waste to energy to achieve Zero Waste to Landfill (Silver 90–94%, Gold 95–99% and Platinum 100%) designations.

  32. Apple’s Regulated Substances Specification describes Apple’s restrictions on the use of certain chemical substances in materials in Apple products, accessories, manufacturing processes and packaging used for shipping products to Apple’s end‑customers. Restrictions are derived from international laws or directives, regulatory agencies, eco‑label requirements, environmental standards and Apple policies. Every Apple product is free of PVC and phthalates except for AC power cords in India, Thailand (for two‑prong AC power cords) and South Korea, where we continue to seek government approval for our PVC and phthalates replacement. Apple products comply with the European Union Directive 2011/65/EU and its amendments, including exemptions for the use of lead such as high‑temperature solder. Apple is working to phase out the use of these exempted substances for new products where technically possible.

Apple Watch Ultra 4, Apple Watch Series 12 and Apple Watch SE 3 require iPhone 11 or later with iOS 27 or later.

Features are subject to change. Some features, applications and services may not be available in all regions or all languages and may require specific hardware and software. For more information, see watchOS Feature Availability.