Apple Watch Ultra 4 Overview
Multi-Day Battery Life
Built for long workouts and extended adventures, Apple Watch Ultra 4 delivers up to 45 hours of Max Extended Workout tracking. A 15-minute fast charge can provide up to 18 hours of use, making it easier to keep tracking without lengthy charging breaks.
Advanced Health and Heart Monitoring
Ultra 4 provides advanced health insights designed to help you better understand your body. It can measure heart rate variability (HRV) as often as every five minutes, provide background heart rate readings every five seconds, and track overnight health metrics through the Vitals app. Additional features include a daily sleep score, menstrual cycle tracking, and blood oxygen readings.
Daily Readiness and Fitness Tracking
The readiness experience provides a single score based on recent activity, vitals, and sleep to help you understand your capacity for the day. For workouts, Ultra 4 supports distance running, triathlons, mountain biking, strength training, and more with dual-frequency GPS, Pacer, Heart Rate Zones, Custom Workouts, and training load.
Safety and Emergency Features
Ultra 4 can detect a hard fall or severe car crash and provides access to emergency services when needed. When cellular service or Wi-Fi isn’t available, built-in satellite communications can be used to text emergency services for help.
Siri AI and Audio Intelligence
With Siri AI, you can use your voice to engage in natural conversations, brainstorm ideas, and more. Audio Intelligence features such as Live Rewind and Siri Recap can help catch missed information and summarize conversations. Siri AI is rolling out in English, while some Audio Intelligence features are planned for beta in late 2026. Usage limits may apply.
Rugged Titanium Design
Built for demanding environments, Apple Watch Ultra 4 features a titanium case and sapphire crystal display and is water resistant to 100m. Its rugged construction makes it suited for swimming, diving, and high-speed water sports.
Cellular Connectivity
With cellular connectivity, Ultra 4 can make and receive calls, stream music and podcasts, and connect with AirPods directly from the watch, even when your iPhone isn’t with you.
