Apple Watch Ultra 4
Built for endurance. Engineered for the extremes.
The Apple Watch Ultra 4 pushes Apple’s rugged flagship even further — combining the most accurate heart rate sensing in a wearable with Apple’s longest-ever Ultra battery life, so you can go further, train harder, and stay connected no matter where your adventure takes you.
A Display Built for Every Environment
The Ultra 4 features an Always-On Retina display built on LTPO 3 technology, dropping to a 1Hz refresh floor when inactive while reaching up to 3,000 nits of peak brightness — bright enough to read clearly in direct sunlight. It’s protected by sapphire crystal, one of the strongest naturally occurring materials available.
The Most Accurate Heart Rate Sensing in a Wearable
Powered by the new Health Sensing System and S11 chip, the Ultra 4 delivers higher-frequency heart rate and heart rate variability (HRV) measurements than ever before, unlocking a new Readiness score to help support athletes of every kind — from weekend warriors to elite competitors.
Longer Battery Life for Longer Adventures
The Ultra 4 delivers up to 50 hours of normal use, with two new extended workout modes pushing that even further: Extended Workout mode enables Low Power Mode during exercise for up to 25 hours of outdoor tracking, while Max Extended Workout disables alerts and splits to stretch battery life up to 45 hours. Fast charging gets you 18 hours of use from just a 15-minute charge.
Precision Tools for Serious Runners
The Ultra 4 is built to be the ultimate running watch, offering Custom Workouts with work and recovery intervals, automatically calculated Heart Rate Zones, VO2 max estimates, and Pacer for hitting specific time and distance goals. Automatic track detection combines Apple Maps data with precision GPS to deliver one of the most accurate track-running experiences available on a sports watch.
Stay Connected, Even Off the Grid
Built-in satellite communications keep you connected and safe in remote areas, supporting Emergency SOS, Messages, and Find My via satellite — with two years of satellite service included.
Smarter with Siri AI and Audio Intelligence
The S11 chip powers Siri AI, offering personal context awareness and the ability to take actions within apps, alongside Audio Intelligence features designed to make everyday tasks feel more effortless.
Built for Extreme Durability
Crafted from aerospace-grade, 100% recycled Grade 5 titanium, the Ultra 4 is rated for 100-meter water resistance and certified for recreational scuba diving to 40 meters. It’s also tested to MIL-STD-810H standards, covering everything from extreme temperatures to shock and vibration resistance.
Two Rugged Finishes
Choose between Natural Titanium or Black Titanium.
Why Choose the Apple Watch Ultra 4?
✔ Most accurate heart rate sensing in a wearable
✔ Longest-ever battery life in an Apple Watch Ultra (up to 50 hours)
✔ Built-in satellite communications for off-grid safety
✔ Precision GPS for the most accurate track running experience
✔ Rugged titanium build rated to 100m water resistance
✔ Siri AI and Audio Intelligence powered by the new S11 chip
Apple Watch Ultra 4 — Full Specifications
Launch
- Announced: September 9, 2026 (“Surprise and Shine” event, Cupertino)
- Pre-orders open now; availability begins September 18, 2026
- Starting price: $799 (add $100 for the Titanium Milanese band, for a total of $899)
- Requires iPhone 11 or later (or iPhone SE, 2nd generation or later) running iOS 27
Display
- Size: 1.9-inch (49mm case)
- Type: Always-On Retina LTPO 3 OLED
- Resolution: 502 x 410 pixels (~338 PPI)
- Refresh: adaptive, down to 1Hz when inactive
- Brightness: up to 3,000 nits peak
- Protection: Sapphire crystal
- Special watch faces: Fathom and Wonder (four depth-themed variants navigated via the Digital Crown)
Performance
- Apple S11 chip (headline upgrade from S10 on Ultra 3)
- Second-generation Ultra Wideband chip
- Storage: 64GB
- Operating system: watch OS 27
Build & Durability
- Case: 49mm height x 44mm width x 12mm depth
- Material: 100% recycled Grade 5 titanium
- Weight: approximately 63.0g (Natural Titanium), 63.1g (Black Titanium) — a marginal 1.4g increase over Ultra 3
- Water resistance: 100m under ISO standard 22810:2010 (swim, snorkel, scuba, high-speed water sports)
- Recreational scuba diving certification: EN13319, to 40 meters
- MIL-STD-810H tested (altitude, high/low temperature, temperature shock, immersion, freeze-thaw, ice/freezing rain, shock and vibration)
- Dust resistance: IP6X
Health Sensing System
- Redesigned optical and electrical heart rate sensors (shared with Series 12)
- Most accurate heart rate sensing claimed in a wearable (per Apple’s internal testing)
- Higher-frequency heart rate and HRV (heart rate variability) measurement
- New Readiness score (0–10 scale combining activity, sleep, vitals, and recovery data)
- Custom Workouts with work/recovery intervals
- Automatically calculated, personalized Heart Rate Zones
- VO2 max estimation
- Pacer (time/distance goal tracking for running and cycling)
- Automatic track detection combined with precision GPS for track running
- Vitals app integration
AI & Audio Intelligence Features
- Siri AI (personal context awareness, in-app actions, dedicated Siri app) — rolling out in English
- Audio Intelligence features powered by the S11 chip — some features arriving in beta late 2026
- Dynamic App Grid (watch OS 27) — automatically surfaces most-used apps
Battery & Charging
- Normal use: up to 50 hours (up from 42 hours on Ultra 3)
- Low Power Mode: up to 84 hours (up from 72 hours on Ultra 3)
- Outdoor workout (continuous GPS): up to 18 hours (up from 14 hours on Ultra 3)
- Extended Workout mode: up to 25 hours (Low Power Mode enabled during exercise; running form metrics unavailable)
- Max Extended Workout mode: up to 45 hours (disables alerts and splits)
- Fast charging: 15-minute charge delivers 18 hours of use
Connectivity
- Cellular: every Ultra 4 (model A3579) includes 5G NR (FDD and TDD bands) and LTE
- Wi-Fi 4 (802.11n), 2.4GHz and 5GHz
- Bluetooth 5.3
- GPS: Precision dual-frequency, using GPS, Galileo, QZSS, and BeiDou (GLONASS no longer listed, unlike Ultra 3)
- Satellite connectivity: Emergency SOS, Messages, and Find My via satellite (2 years of service included)
- NFC, Apple Pay
Software Features
- Topographic maps for thousands of U.S. national and regional parks
- Hundreds of curated hikes across all 63 U.S. national parks
- Gym Kit support
Finishes
- Natural Titanium
- Black Titanium
In the Box
- Apple Watch Ultra 4
- Band
- Apple Watch Magnetic Fast Charger to USB-C Cable
