Apple Watch Ultra 4

Name: Apple Watch Ultra 4
Brand: Apple
Price: 799 USD
Availability: InStock

iPhone onlyPaid tier: Apple Fitness+4 FDA-cleared features

Apple's outdoor and endurance model keeps the 49 mm titanium case and sapphire crystal but adds the 2026 Health Sensing System, which Apple says samples heart rate 60x more often than Ultra 3. Apple rates it for 50 hours of normal use against 24 for Series 12, and it alone gets dual-frequency GPS, a siren, dive-computer certification and satellite messaging. Every unit is a cellular model.

Approx. price

~$799

maker's list price, not a live price

Battery, smartwatch mode

50 h

the maker's headline

Battery, always-on display

not published

the maker gives no figure

Battery, GPS workout

18 h

maker's figure

Works with

iPhone only

see the limits below

Weight

63 g

natural titanium, case only (black: 63.1 g) (Apple spec page)

Best for: iPhone owners who hike, dive or race long and want two days between charges

Battery: the claim and the other two figures

Claimed (smartwatch mode): 50 h
With always-on display: not published
GPS workout: 18 h

Headline: Apple: 'Multiday battery life, up to 50 hours of normal use' (includes 12 hours of sleep tracking).
GPS: Apple: 'Up to 18 hours workout tracking' — outdoor run, without iPhone, heart rate on; Apple does not separate single- and dual-frequency GPS figures.
Apple: up to 84 hours in Low Power Mode, 25 hours Extended Workout and 45 hours Max Extended Workout (Low Power Mode on, some metrics off)

The ring’s outer track is the headline claim; the inner two are the always-on and GPS figures as a share of it. An empty track means Apple does not publish that figure. Why the figures differ

Phones, paid tier and updates

iPhone:: Yes.
Android:: No.; Needs iPhone 11 or later with iOS 27 or later; Apple sells no Android pairing
Paid tier:: Apple Fitness+, $79.99/year.; No watch feature requires it; it adds guided workout and meditation video classes that use the watch's metrics on screen; Watch plus two years of Apple Fitness+: ~$959.
LTE:: GPS + Cellular version needs a carrier plan; the carrier sets the price (apple.com/watch/cellular)
Software updates:: Apple does not publish a guaranteed number of update years for this model.

Cleared health features

ECG app (FDA)FDA De Novo DEN180044 'ECG App', Apple Inc., granted 09/11/2018; Apple lists the ECG app on this model's spec page Source
Irregular rhythm notifications (FDA)FDA De Novo DEN180042 'Irregular Rhythm Notification Feature', Apple Inc., granted 09/11/2018; listed on this model's spec page Source
Sleep apnea notifications (FDA)FDA 510(k) K240929 'Sleep Apnea Notification Feature (SANF)', Apple Inc., cleared 09/13/2024; Apple: available on Series 9 and later, Ultra 2 and later, and SE 3 Source
Hypertension notifications (FDA)FDA 510(k) K250507 'Hypertension Notification Feature (HTNF)', Apple Inc., cleared 09/11/2025; listed on this model's spec page Source

A clearance says what a feature is allowed to claim, not that it replaces a doctor. Cleared versus wellness features

Specifications

Approx. price: ~$799 (49mm titanium (GPS + Cellular is the only version), 'From $799' on apple.com/shop/buy-watch)
Type: Rugged outdoor
Platform: watchOS
Case sizes: 49 mm
Weight: 49 mm: 63 g (natural titanium, case only (black: 63.1 g) (Apple spec page))
Battery, smartwatch mode: 50 h (Apple: 'Multiday battery life, up to 50 hours of normal use' (includes 12 hours of sleep tracking))
Battery, always-on display: Not published by the maker
Battery, GPS workout: 18 h (Apple: 'Up to 18 hours workout tracking' — outdoor run, without iPhone, heart rate on; Apple does not separate single- and dual-frequency GPS figures)
Battery note: Apple: up to 84 hours in Low Power Mode, 25 hours Extended Workout and 45 hours Max Extended Workout (Low Power Mode on, some metrics off)
Works with: iPhone only
iPhone: Yes
Android: No
Phone limits: Needs iPhone 11 or later with iOS 27 or later; Apple sells no Android pairing
Paid tier: Apple Fitness+, $79.99/year
What the paid tier gates: No watch feature requires it; it adds guided workout and meditation video classes that use the watch's metrics on screen
Update years: Not published by the maker
Cleared health features: ECG app (FDA), Irregular rhythm notifications (FDA), Sleep apnea notifications (FDA), Hypertension notifications (FDA)
Display: OLED
Always-on display: Yes
Dual-band GPS: Yes
Maps: Downloadable maps, no topo (Apple: 'Offline maps with custom route creation', 'Topographic maps for thousands of national and regional parks (U.S. only)', plus Backtrack and elevation alerts)
Music on the watch: Yes
LTE: Optional (GPS + Cellular version needs a carrier plan; the carrier sets the price (apple.com/watch/cellular))
Contactless pay: Yes
Flashlight: No
Water rating: WR100 (100 m, ISO 22810:2010), EN13319 dive to 40 m, IP6X
Case: titanium
Released: 2026

Features, per Apple

Satellite Emergency SOS, Messages and Find My
Dual-frequency GPS
3000-nit flat sapphire display with Night Mode
Action button siren Apple says carries up to 600 feet
EN13319 recreational diving to 40 m
MIL-STD 810H tested
Same four FDA-cleared features as Series 12

Where the specs put it ahead

Roughly twice the Series 12's battery rating, so a weekend away needs no charger
Dual-frequency GPS for better tracks under tree cover and between buildings
Satellite SOS and Messages work with no cellular signal; Apple includes them free for two years
Max Extended Workout stretches GPS tracking to 45 hours for ultra events
Dive-rated to 40 m, which no Series or SE model is
Keeps every health feature of the Series 12, including hypertension notifications
Cellular is standard, so there is no separate GPS-only version to pick between

What it gives up

63 g titanium case is heavy for sleep tracking and small wrists, with no smaller size
Highest Apple Watch price
Still iPhone-only
Topo maps cover U.S. parks only, not the worldwide topo of a Garmin fenix
Satellite features are free for two years only

The two lists above are drawn from the maker’s own pages and prices, not from owner reports. Where owner discussion has been read it appears in its own section below, so the two are never mistaken for each other.