Smartwatches
Apple Watch Ultra 4 GPS + Cellular 49mm Smartwatch
$779.00
Price captured 2026-09-22 · check Amazon for the current price.
The only smartwatch in this comparison rated for 100m water resistance with satellite SOS.
Price history
Editor scores (0–10) — not a manufacturer spec.
| Display size | — |
|---|---|
| Display type | OLED Always-On Retina, sapphire crystal |
| Battery life | 2 days |
| Water resistance | 100m |
| Built-in GPS | ✓ Yes |
| Heart rate monitor | ✓ Yes |
| OS | watchOS |
| Weight | — |
Editor's take
Apple's rugged, titanium-cased flagship adds cellular calling, satellite SOS and 100m water resistance to the Series-line health tracking, aimed at endurance athletes and outdoor use rather than everyday commuting.
The Ultra 4 is built for extremes: a titanium case with a sapphire crystal display, water resistance to 100m, and precision dual-frequency GPS for accurate tracking on trails and in cities with tall buildings. Battery life is rated for up to 45 hours in Max Extended Workout mode, and Apple markets the watch generally as a '2+ day' device in normal use — a real step up from the standard Series line's roughly one-day battery.
Cellular connectivity means calls, streaming and AirPods playback work even without an iPhone nearby, and built-in satellite communications let you text emergency services when there's no cell or Wi-Fi signal — a genuinely useful safety feature for backcountry use. The same health stack as the Series line carries over: HRV every 5 minutes, background heart rate every 5 seconds, Vitals, sleep score, and the daily readiness score.
This specific listing has only 1 review, so its 5.0 rating shouldn't be read as a settled verdict. Amazon's spec table for this listing is also sparse — no official device weight or display size was published, so those are left unconfirmed here rather than guessed. At $779, it's the most expensive smartwatch in this comparison.
Pros
- Titanium case, sapphire crystal display, and 100m water resistance built for rugged/outdoor use
- Up to 45 hours in Max Extended Workout mode — meaningfully longer than the standard Series line
- Cellular + satellite SOS work even without an iPhone or Wi-Fi nearby
- Precision dual-frequency GPS for more accurate outdoor tracking
Cons
- Only 1 review on this listing so far — far too early to call the 5.0 rating reliable
- Most expensive smartwatch in this comparison at $779
- Amazon's listing doesn't publish an official case weight or display size
- Cellular plan required separately from a carrier to use calling away from an iPhone
Ideal for: Endurance athletes, divers, and outdoor adventurers who need multi-day battery, real water resistance, and satellite SOS, and are willing to pay a premium for it.
Reviews
Just 1 review so far, rated 5 out of 5 — an encouraging start but not yet a meaningful sample size.
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