Apple Watch Ultra 4 with Milanese Loop (Size Choice)

Apple Watch Ultra 4 is the ultimate running and sports watch with multi-day battery life to go the distance.(2) It delivers game-changing health and fitness tracking, enabled by the most accurate heart rate sensing in a wearable.(1) With high-frequency HRV readings for insights on stress, recovery and your readiness to take on the day. And now every day is more effortless with Siri AI(3) and Audio Intelligence.(4)

Multi-day battery life
Ultra 4 is a smartwatch with ultramarathon battery stamina,(2) perfect for runners to go the distance — with up to 45 hours of Max Extended Workout tracking.(5) And you can fast-charge in just 15 minutes for up to 18 hours of use.(6)

Stay closer to your heart health
The most accurate heart rate sensing in a wearable,(1) Ultra 4 now measures HRV as often as every five minutes for insights on stress and recovery, and background heart rate readings every five seconds.

A full-featured health tracker
Better understand your body with advanced health insights. View your overnight health metrics with the Vitals app(7) and get a daily sleep score, track your menstrual cycle(8) and take readings of your blood oxygen.(9)

Check your readiness for the day
Know when to rest or put yourself to the test. The readiness experience gives you one clear score and can help you determine your capacity to take on the day by analysing your recent activity, vitals and sleep.

Ultimate running and workout companion
A superior fitness tracker for distance running, triathlons, mountain biking, strength training and more. Ultra 4 has precision dual-frequency GPS, Pacer, Heart Rate Zones, Custom Workouts, training load and more.

Keep help close at hand
A smartwatch that puts your safety first. Ultra 4 can detect a hard fall or serious car crash.(10) If you don’t have mobile service or Wi-Fi, built-in satellite communications let you text emergency services to get help.(11)

Siri AI and Audio Intelligence
Using just your voice, engage in natural, back-and-forth conversations, brainstorm ideas and more with Siri AI.(3) Audio Intelligence helps catch what you missed and summarise conversations with Live Rewind and Siri Recap.(4) Siri AI is rolling out in English. Some Audio Intelligence features coming in beta late 2026. Usage limits may apply.

Rugged and ready to go
Ultra 4 is built for extreme environments with a tough titanium case and a strong sapphire crystal display. Water resistant up to 100m, this smartwatch is great for swimmers, divers and fans of high-speed water sports.(12)

The freedom of cellular
With just your smartwatch, you can take and make calls, stream music and podcasts, and listen with your AirPods — even without your iPhone.(13)