Apple Watch Ultra vs Apple Watch Ultra 4

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Watch Ultra compared with Watch Ultra 4

	AppleWatch Ultra	AppleWatch Ultra 4
Overview
Released
Released	September 2022	September 2026
Display
Case sizes
Case sizes	49 mm	49 mm
Panel
Panel	LTPO OLED	LTPO OLED
Peak brightness
Peak brightness	2,000 nits	3,000 nits (better)
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	LTPO2 OLED Always-On Retina display; 410 x 502 pixels; 1,185 sq mm display area; Night Mode on the Wayfinder face	Always-On Retina display with wide-angle OLEDs and LTPO3; 1Hz refresh; 422 x 514 pixels at 326 ppi; 1,245 sq mm display area; 1 nit minimum brightness; Night Mode for Ultra watch faces
Screen protection
Screen protection	Flat sapphire front crystal, with the case raised around its edges	Flat sapphire crystal front
Health and fitness
ECG
ECG	Yes	Yes
Blood oxygen
Blood oxygen	Yes	Yes
Skin temperature
Skin temperature	Yes	Yes
Sleep apnoea alerts
Sleep apnoea alerts	No	Yes
High blood pressure alerts
High blood pressure alerts	No	Yes
Body composition
Body composition	No	No
Fall detection
Fall detection	Yes	Yes
Crash detection
Crash detection	Yes	Yes
GPS
GPS	Dual-band (L1 and L5)	Dual-band (L1 and L5)
Water resistance
Water resistance	100 m	100 m
Sensors
Sensors	Electrical heart sensor (ECG app); blood oxygen sensor; third-generation optical heart sensor; temperature sensing with a two-sensor design; compass; always-on altimeter; high-g accelerometer (up to 256 g-forces); high dynamic range gyroscope; ambient light sensor; water temperature sensor; depth gauge	Health Sensing System with third-generation electrical heart sensor, always-on optical heart sensor, blood oxygen sensor and temperature sensor; depth gauge to 40 m; water temperature sensor; compass; always-on altimeter (–500 m to 9,000 m); high-g accelerometer; high dynamic range gyroscope; ambient light sensor
Health features
Health features	ECG app; Blood Oxygen app; irregular rhythm notifications; temperature sensing for retrospective ovulation estimates in Cycle Tracking	Readiness app; Vitals app (heart rate, respiratory rate, wrist temperature, blood oxygen, sleep duration and HRV); Recovery HRV; high-frequency background heart rate tracking; ECG app; Blood Oxygen app; irregular rhythm notifications; high and low heart rate notifications; hypertension notifications; sleep apnoea notifications; sleep stages and sleep score; Cycle Tracking with fertile window and retrospective ovulation estimates, perimenopause and menopause support; Medications; Mindfulness; Noise
Fitness features
Fitness features	Depth app and recreational diving to 40 m with the Oceanic+ app; Backtrack; Compass Waypoints; Action button for workouts, segments and waypoints; GymKit	Customisable Action button with Precision Start; custom workouts; Training Load and Workout Effort; customisable heart rate zones; VO2 max; Race Route; Pacer; cadence, stride length, ground contact time, vertical oscillation and running power; multisport workouts; offline maps with custom route creation; elevation alerts; Backtrack; swimming with water temperature; recreational diving to 40 m with Depth app and third-party dive computer apps; cycling with power meters; GymKit
Safety features
Safety features	Emergency SOS; international emergency calling; Fall Detection; Crash Detection; 86 dB emergency siren	Emergency SOS and Find My via satellite; Emergency SOS; international emergency calling; Siren; Fall Detection; Crash Detection; Check In; Backtrack; Last Emergency Call Availability Waypoint; torch; noise monitoring
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 36 hours	Up to 50 hours
In low-power mode
In low-power mode	–	Up to 84 hours
Mobile data option
Mobile data option	Yes	Yes
Works with
Works with	iPhone	iPhone
Chip
Chip	S8	S11
Storage
Storage	32 GB	64 GB (better)
Battery life detail
Battery life detail	Up to 36 hours of normal use; up to 18 hours on LTE	Up to 50 hours of normal use; up to 84 hours in Low Power Mode; up to 18 hours of outdoor workout, 25 hours in Extended Workout and 45 hours in Max Extended Workout
Charging
Charging	Apple Watch Magnetic Fast Charger to USB-C Cable	Fast charging to 80% in about 45 minutes; 15 minutes for up to 18 hours of normal use; 5 minutes for up to 10 hours of sleep tracking
Connectivity
Connectivity	4G LTE and UMTS; Wi-Fi 802.11b/g/n at 2.4 GHz and 5 GHz; Bluetooth 5.3; W3 wireless chip; U1 chip (Ultra Wideband); L1 and L5 GPS with GLONASS, Galileo, QZSS and BeiDou; Apple Pay	GPS + Cellular only (model A3579) with 5G RedCap and LTE; satellite communications; Wi-Fi 4 (802.11n) at 2.4GHz and 5GHz; Bluetooth 5.3; second-generation Ultra Wideband chip; NFC for Apple Pay; precision dual-frequency GPS (GPS, Galileo, QZSS and BeiDou)
Storage
Storage	32GB	–
Design
Weight (lightest version)
Weight (lightest version)	61.3 g (better)	63 g
Software
Software	watchOS	watchOS
Case materials
Case materials	Aerospace-grade natural titanium case; ceramic and sapphire crystal back; water resistant to 100 m (ISO 22810); IP6X dust resistant; tested to MIL-STD 810H; on-wrist operating temperature from -20°C to 55°C	Grade 5 titanium case (100% recycled titanium) with ceramic and zirconia back; water resistant to 100 m (ISO 22810:2010); EN13319 recreational diving to 40 m; IP6X dust resistant; tested to MIL-STD 810H
Size
Size	49 x 44 x 12 mm; 61.3 g	49 x 44 x 12 mm; 63.0 g (natural) or 63.1 g (black)
Bands
Bands	Alpine Loop, Trail Loop and Ocean Band	Fits 130–210 mm wrists
Colours
Colours	Natural titanium	Natural or Black titanium
In the box
In the box	Apple Watch Ultra, band or loop, Apple Watch Magnetic Fast Charger to USB-C Cable (1 m)	Apple Watch Ultra 4, strap, Apple Watch Magnetic Fast Charger to USB-C Cable (1 m)