Apple Watch Ultra 3 MF1T4LW/A, 49mm
Apple Watch Ultra 3 is a 49mm titanium smartwatch with a sapphire crystal display, 100m water resistance, dual-frequency GPS and cellular.
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About this item
- Titanium case and sapphire crystal display, water resistant up to 100m for swimming and water sports
- ECG, AFib rhythm check, blood oxygen readings, sleep score and Vitals app overnight metrics
- Dual-frequency GPS with Pacer, Heart Rate Zones, Custom Workouts and running power
- Fall and crash detection plus Check In to notify emergency services or loved ones
- Up to 42 hours of normal use and up to 72 hours in Low Power Mode
- Larger, brighter display that doubles as a flashlight, plus a customizable Action button
Top Highlights
- Brand
- Apple Watch
- Model Name
- Ultra 3
- Model Number
- MF1T4LW/A
- Department
- Unisex
- Item Type
- Smart Watch
- Manufacturer
- Apple
- First Available
- September 8, 2025
- Release Year
- 2025
Features & Specs
- Display
- Digital
- Case Material
- Titanium
- Case Size
- 49 mm
- Weight
- 63.5 g
- Water Resistance
- 100 m
- Crystal
- Sapphire crystal
Style
- Dial Shape
- Rectangle
- Collection
- Apple Watch Ultra
Description
The Apple Watch Ultra 3 is built for runners, triathletes, hikers and climbers who want a rugged smartwatch that also handles everyday life. It pairs a 49mm titanium case with a sapphire crystal display and a larger screen that emits more light at wider angles.
On the technical side, it offers 100m water resistance, dual-frequency GPS and a cellular connection with 5G. Health tools include ECG, an irregular rhythm check for AFib, blood oxygen readings, a sleep score and overnight metrics in the Vitals app.
Battery life reaches up to 42 hours of normal use and up to 72 hours in Low Power Mode. A customizable Action button gives quick access to functions such as starting a workout or switching on the flashlight, and fall and crash detection adds a safety net on remote routes.
Frequently Asked Questions
Can I swim and shower with the Apple Watch Ultra 3?
The Apple Watch Ultra 3 is rated water resistant to 100m, so it handles pool and open-water swimming and water sports. It is also fine in the shower, though soap and hot water can wear on bands over time, so rinsing it afterwards is sensible.
How long does the battery last on a trail run?
Apple quotes up to 42 hours of normal use and up to 72 hours in Low Power Mode. A GPS workout with heart rate monitoring can run for up to 20 hours in Low Power Mode, which covers most ultra-distance events on this Watch Ultra 3.
Is it suitable for daily wear on a smaller wrist?
The 49mm titanium case is large and has a notable presence on the wrist. Those with slimmer wrists should try it first, as the Watch Ultra 3 is sized for sport and visibility rather than a discreet, dressy profile.
How does it compare to a regular smartwatch for sport?
Versus a standard model, the Ultra 3 adds a titanium case, sapphire crystal, dual-frequency GPS and longer battery life. If you mostly track steps and notifications, a smaller alternative may suffice; for marathons or hiking, this one is better suited.
Does it work without my iPhone nearby?
With cellular and 5G, the Watch Ultra 3 can make calls, stream music and podcasts and play audio through AirPods or its built-in speaker without a phone. Some features, such as Workout Buddy, rely on a nearby iPhone.
What safety features does it offer for solo outdoor activity?
It can detect a hard fall or severe car crash and help connect you to emergency services and your emergency contacts. Check In can also notify a loved one when you arrive, which is useful on remote routes.
Editor's take
The Apple Watch Ultra 3 sits at the top of Apple's wearable range and is aimed at people who train hard outdoors: marathoners, triathletes, trail runners and climbers. The 49mm case is made of titanium, which keeps weight down while resisting knocks and scratches better than aluminum would.
The display is protected by sapphire crystal, and the screen is larger than before and emits more light at wider angles, which helps when you glance at it mid-run. Navigation relies on dual-frequency GPS, a sensible choice for trails and city streets where signals bounce around, and the 100m water resistance rating covers swimming and water sports.
The main trade-off is battery life. Up to 42 hours of normal use and 72 hours in Low Power Mode is a clear step up for Apple, but it still means regular charging, unlike a conventional quartz or mechanical watch. A 100m rating also suits swimming rather than serious technical diving, so divers should check what their dive computer provides.
It makes sense for athletes who want ECG, fall detection, cellular calls over 5G and training tools such as Pacer and Custom Workouts on one wrist. Buyers who care more about battery longevity or a slimmer profile could look at dedicated GPS sports watches or smaller smartwatches instead.
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