Apple Watch Ultra 4

A battery you can't outrun. The ultimate sports and adventure watch pairs a rugged 49mm aerospace-grade titanium case with the longest battery life of any Apple Watch, an all-new Health Sensing System with the most accurate heart rate sensing in a wearable, precision dual-frequency GPS, and a flat sapphire crystal display that reaches 3000 nits.

49mm Grade 5 Titanium

Up to 50 Hours Battery

All-New Health Sensing System

S11 Chip

3000 Nits Sapphire Display

100m Water Resistant · Dive to 40m

Precision Dual-Frequency GPS

5G Cellular Standard

Apple Intelligence

watchOS 27

Extreme Staying Power

The longest battery life of any Apple Watch: up to 50 hours of normal use and up to 84 hours in Low Power Mode. Optimized workout algorithms deliver up to 18 hours of standard workout tracking and up to 45 hours of Max Extended Workout tracking — enough time to complete a 100-mile race. Fast-charge in just 15 minutes for up to 18 hours of use.

All-New Health Sensing System

Redesigned optical and electrical sensors work with the S11 chip to deliver the most accurate heart rate sensing in a wearable — background readings every five seconds and HRV as often as every five minutes, 60x and 24x more frequent than Ultra 3. A new readiness score, Recovery HRV, sleep score, ECG, and Blood Oxygen complete the picture.

Built Ultra Tough

A rugged case in aerospace-grade Grade 5 titanium (100% recycled) with a flat sapphire crystal display — one of the strongest naturally occurring materials on Earth. MIL-STD 810H tested, water resistant to 100m, IP6X dust resistant, and EN13319 rated for recreational scuba diving to 40 meters with a built-in depth gauge and water temperature sensor.

Geared to Go Farther

Precision dual-frequency GPS tracks your runs, rides, and swims with extreme accuracy. The customizable Action button gives physical control over workouts, intervals, and the 86-decibel siren, audible up to 180 meters away. Backtrack, waypoints, Race Route, Pacer, triathlon Multisport, and full dive-computer apps make it the ultimate expedition tool.

Technical Specifications

BrandApple

ModelApple Watch Ultra 4 — Titanium (Grade 5)

ChipApple S11 SiP · 64-bit dual-core · 4-core Neural Engine · 64GB capacity

DisplayAlways-On Retina · wide-angle OLED LTPO3 · 422 by 514 pixels · up to 3000 nits · 1 nit minimum · Night Mode

Front CrystalFlat sapphire crystal

Case Size49mm · fits 130–210mm wrists · 63.0g (Natural) / 63.1g (Black)

ColorsNatural Titanium · Black Titanium

BandsOcean Band (One Size) · Alpine Loop (Small / Medium / Large) · Trail Loop (S/M · M/L) · Titanium Milanese Loop (Small / Medium / Large)

ConnectivityGPS + Cellular standard · 5G (RedCap) and LTE · Precision dual-frequency GPS (GPS, Galileo, QZSS, BeiDou) · Wi-Fi 4 · Bluetooth 5.3 · second-generation Ultra Wideband

HealthReadiness app · Recovery HRV · High-frequency background heart rate tracking · ECG · Blood Oxygen · Sleep Score · Sleep Apnea Notifications · Vitals app with HRV · Advanced Cycle Tracking

Intelligence & InteractionApple Intelligence · Siri AI · Customizable Action button · Wrist Flick · Single & Double Tap · Precision Finding for iPhone

SafetyFall Detection · Crash Detection · Emergency SOS · International Emergency Calling · 86dB Siren (audible up to 180m) · Check In · Backtrack

Water & Dust100m water resistance (swim, snorkel, scuba, high-speed water sports) · EN13319 recreational scuba to 40m · IP6X dust resistant · Depth gauge · Water temperature sensor

DurabilityMIL-STD 810H tested · On-wrist operating temperature –20° to 55°C · Operating altitude –500m to 9000m

BatteryUp to 50 hours normal use · up to 84 hours in Low Power Mode · up to 18 hours outdoor workout · 25 hours Extended Workout · 45 hours Max Extended Workout

Charging0–80% in about 45 min · 15 min for up to 18 hours · 5 min for up to 10 hours of sleep tracking (Magnetic Fast Charger to USB-C)

AudioDual speakers with Siren · Three-microphone array with beamforming and wind noise mitigation

SoftwarewatchOS 27 · requires iPhone 11 or later with iOS 27

Part NumbersPer configuration — each case + band + size combination carries its own Apple part number (MJAD4 – MJC44), shown as the SKU of the selected variant

In the BoxApple Watch Ultra 4 · Band of your chosen configuration · Apple Watch Magnetic Fast Charger to USB-C Cable (1m)

WarrantyApple official 1-year limited warranty

Frequently Asked Questions

Which band styles does Ultra 4 come with?

Choose your configuration right on this page: Ocean Band (Translucent Gray or Translucent Black), Alpine Loop (Desert or Burgundy), and Trail Loop (Sand or Burgundy) at the standard price, or the Titanium Milanese Loop (Natural or Black Titanium) at a premium. Each band's available sizes are selectable above — Ocean is one-size, Alpine and Milanese come in Small/Medium/Large, Trail in S/M and M/L.

What is new compared to Ultra 3?

The headline upgrades: an all-new Health Sensing System with the most accurate heart rate sensing in a wearable (60x more frequent background readings, 24x more frequent HRV), a new readiness score, the longest battery life of any Apple Watch — up to 50 hours, with up to 45 hours of Max Extended Workout tracking — 15-minute fast charging for up to 18 hours, and Apple Intelligence with Siri AI on watchOS 27.

Is there a GPS-only model?

No — every Apple Watch Ultra 4 is GPS + Cellular with superfast 5G capability as standard. You can use it without a cellular plan, and add one anytime to text, talk, stream, and work out with your iPhone left at home.

Can I really dive with it?

Yes. Ultra 4 is water resistant to 100 meters and EN13319 rated for recreational scuba diving to 40 meters. With the built-in depth gauge, water temperature sensor, and dive computer apps like Oceanic+, it is a fully capable dive companion.

Is it genuine Apple?

Yes — 100% genuine Apple, supplied under official Apple part numbers (one per case-and-band configuration — the SKU shown for your selected variant, e.g. MJAD4 for Natural Titanium with the Translucent Gray Ocean Band), and covered by Apple's official 1-year limited warranty.