Apple Watch Ultra 4 vs Samsung Galaxy Watch Ultra2

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Watch Ultra 4 compared with Galaxy Watch Ultra2

	AppleWatch Ultra 4	SamsungGalaxy Watch Ultra2
Overview
Released
Released	September 2026	August 2026
Display
Case sizes
Case sizes	49 mm	47 mm
Panel
Panel	LTPO OLED	OLED
Peak brightness
Peak brightness	3,000 nits	5,000 nits (better)
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	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	Super AMOLED with full-colour Always On Display; 1.52-inch (38.5 mm) with 498 x 498 pixels; 16M colours; 5,000 nits is the localised peak under high ambient light
Screen protection
Screen protection	Flat sapphire crystal front	Sapphire Crystal
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	Yes	Yes
High blood pressure alerts
High blood pressure alerts	Yes	No
Body composition
Body composition	No	Yes
Fall detection
Fall detection	Yes	Yes
Crash detection
Crash detection	Yes	No
GPS
GPS	Dual-band (L1 and L5)	Dual-band (L1 and L5)
Water resistance
Water resistance	100 m	100 m
Sensors
Sensors	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	Samsung BioActive Sensor (optical bio-signal sensor, electrical heart signal sensor and bioelectrical impedance analysis sensor); temperature sensor; accelerometer; barometer; gyro sensor; geomagnetic sensor; light sensor
Health features
Health features	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	ECG with Irregular Heart Rhythm Notification, blood pressure (calibrated against an arm cuff every 4 weeks) and sleep apnoea detection in the Samsung Health Monitor app, which needs a Galaxy phone; Vitals (heart rate, heart rate variability, respiratory rate, skin temperature and blood oxygen during sleep, against a personal baseline); Heart Health Score; Vascular Load; Antioxidant Index; AGEs Index; Energy Score; sleep tracking, Sleep Coaching and Bedtime Guidance; body composition; High Stress Alert; Cycle Tracking; Hearing, with alerts for unsafe noise levels
Fitness features
Fitness features	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	Trail Run with GPX routes, turn-by-turn navigation, Climb Guidance and Water Intake Alarm; Depth app for depth, dive time and water temperature to 40 m; direct connection to cycling power, speed and cadence sensors; Track Back; Running Coach; Fitness Index; Daily Cardio Load; Personalised Heart Rate Zone; Personalised Functional Threshold Power; Strava and iFIT apps
Safety features
Safety features	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	Emergency SOS (five presses of the home button); Fall Detection; 86 dB siren heard up to 180 m (hold the orange Quick Button for 5 seconds)
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 50 hours	Up to 60 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	Android
Chip
Chip	S11	Snapdragon Wear Elite
Storage
Storage	64 GB	64 GB
Battery life detail
Battery life detail	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	Up to 60 hours with Always On Display on and up to 80 hours with it off; GPS up to 20 hours and GPX route navigation up to 16 hours with power saving mode (Standard) on during exercise; 800 mAh typical capacity
Charging
Charging	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	High-Frequency Fast Charging (WPC-based wireless charging) to 40% in about 30 minutes with the Fast Wireless Charger (EP-OL715) in the box and a 5 V / 2 A PD adapter
Connectivity
Connectivity	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)	LTE with eSIM (4G LTE and 3G); Bluetooth 6.0; Wi-Fi 802.11a/b/g/n at 2.4 GHz and 5 GHz; NFC; L1 + L5 dual-frequency GPS with Glonass, Beidou, Galileo and QZSS; pairs with Android 13 or later phones with more than 1.5 GB of memory
Storage
Storage	–	2 GB memory; 64 GB storage (49.3 GB available)
Design
Weight (lightest version)
Weight (lightest version)	63 g	61.5 g (better)
Software
Software	watchOS	Wear OS
Case materials
Case materials	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	Titanium case (titanium on the front and back cover areas of the frame, the rest of the frame is plastic and other materials); Sapphire Crystal; 10ATM (100 m, ISO 22810, tested in salt and chlorinated water), IP68 and IP69K; EN13319; MIL-STD-810H; works on the wrist from -20°C to 55°C
Size
Size	49 x 44 x 12 mm; 63.0 g (natural) or 63.1 g (black)	47.4 x 47.1 x 10.7 mm; 61.5 g (watch body without band)
Bands
Bands	Fits 130–210 mm wrists	Marine Band (S/M/L) in the box, with an Air Pocket inner surface; PeakForm Band and Trail Band sold separately
Colours
Colours	Natural or Black titanium	Titanium Silver, Titanium Grey
In the box
In the box	Apple Watch Ultra 4, strap, Apple Watch Magnetic Fast Charger to USB-C Cable (1 m)	Galaxy Watch Ultra2, Marine Band, Fast Wireless Charger