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Apple Watch Ultra 4 (GPS + Cellular) 49mm Titanium Case with Burgundy Trail Loop - S/M - Black (AT&T) - (2026)

Model: MJC34LS/A
SKU: 6598080
Sold byBest Buy

About this product

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 AI³ and Audio Intelligence.⁴

Features

  • 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 app⁷ 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 analyzing 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 severe car crash.¹⁰ If you don’t have cell 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 summarize 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

Specifications

  • Screen Size
    49 millimeters
    Operating System Compatibility
    Apple iOS
    Operating System
    watchOS
    Carrier
    AT&T
    Built-in Storage
    64 gigabytes
    Global Positioning
    GPS
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Reviews

Rating 4.9 out of 5 stars with 179 reviews

100% would recommend to a friend

Customer Images

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 5 out of 5 stars

    Absolutely Love It – Apple at Its Best!

    I absolutely love this Apple Watch Ultra 4! From the moment I got it, I was impressed by its premium look, beautiful design, and incredible attention to detail. The 49mm titanium case looks amazing, and the Burgundy Trail Loop is honestly one of my favorite details. It gives the watch a distinctive, stylish look while maintaining the rugged character of the Ultra series. What I appreciate most is how perfectly it combines style, technology, and everyday functionality. The GPS + Cellular connectivity makes it even more convenient, and I love having such a capable device on my wrist throughout the day. The comfort, premium finish, and overall experience make this watch feel truly special. It looks fantastic, feels great, and makes me appreciate Apple's commitment to innovation even more. I'm genuinely happy with this purchase. Every detail makes it feel like a premium product, and I couldn't be more pleased with my choice. If you're looking for a smartwatch that combines outstanding design, versatility, and premium technology, this one is definitely worth considering. Absolutely love it!

    This review is from Apple Watch Ultra 4 (GPS + Cellular) 49mm Titanium Case with Burgundy Trail Loop - M/L - Black - (2026)

    Posted by WilliamR

  • Rated 5 out of 5 stars

    apple watch

    build quality is top tier battery life is very long just overall great watch

    This review is from Apple Watch Ultra 4 (GPS + Cellular) 49mm Titanium Case with Translucent Gray Ocean Band - Natural - (2026)

    Posted by AirTag

  • Rated 5 out of 5 stars

    Awesome Watch with Great Features

    I upgraded from an Apple Watch Series 7. A night and day difference! My series 7 required daily charging. My Ultra 4 still has 25% charge after three days running. Adding customized widgets to the watch face is quick and easy. I bought the watch for the new glucose and blood pressure monitoring functionality. There are several apps to choose from that I’m investigating. I selected the titanium watch band that’s easy to latch/unlatch. The fall detection function can be a bit touchy going off when you bump or pound something requiring a quick response to cancel an automatic call to 911. Overall an excellent watch!

    This review is from Apple Watch Ultra 4 (GPS + Cellular) 49mm Titanium Case with Black Titanium Milanese Loop - M - Black - (2026)

    Posted by Sonja

  • Rated 5 out of 5 stars

    Apple Watch Ultra 4 - Exceptional!

    Battery life is terrific I enjoy the slightly larger screen As an Apple Watch user since Gen 0 I find this to be quite an upgrade from the last one, which as a 9. It is fast. I use it for running, biking, listening to podcasts or music while I'm out. I'm enjoying having the cellular connection, keeping on top of any text messages emails while I'm out and about without having to have my phone with me. Use it in the gym like this while listening to music and podcasts without the tether of a phone.

    This review is from Apple Watch Ultra 4 (GPS + Cellular) 49mm Titanium Case with Translucent Black Ocean Band - Black - (2026)

    Posted by DAVIDK

  • Rated 5 out of 5 stars

    Great watch with long battery life

    Battery life is great on this watch. Can go around 3 days without charging it. I use it all day while at work and was sleeping with it for some time as well and the battery still lasted long. The strap on this one specifically is very nice and easy to put on. Feels very comfortable. Just be mindful that the strap can get dirty easier compared to the other plastic/rubber straps. Overall very happy with the watch so far after owning it since it came out.

    This review is from Apple Watch Ultra 4 (GPS + Cellular) 49mm Titanium Case with Desert Alpine Loop - L - Natural - (2026)

    Posted by LUIS

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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 AI³ and Audio Intelligence.⁴

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Specs

Questions & Answers

  • Does this Apple Watch measure resting heart rate?

    Yes, this Apple Watch measures resting heart rate.

    This question and answer was generated by AI based on customer and product data.
  • Does this Apple Watch have GPS?

    Yes, this Apple Watch has GPS enabled.

    This question and answer was generated by AI based on customer and product data.
  • What is the built-in storage capacity of this Apple Watch?

    This Apple Watch has a built-in storage of 64 gigabytes.

    This question and answer was generated by AI based on customer and product data.
  • What type of material is the Apple Watch case made of?

    The Apple Watch case is made of titanium material.

    This question and answer was generated by AI based on customer and product data.
  • Is this Apple Watch water resistant?

    Yes, this Apple Watch is water resistant.

    This question and answer was generated by AI based on customer and product data.
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