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Apple Watch Series 11 vs Apple Watch Ultra 4

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

AppleWatch Series 11AppleWatch Ultra 4
Overview
ReleasedSeptember 2025September 2026
Display
Case sizes42 mm or 46 mm49 mm
PanelLTPO OLEDLTPO OLED
Peak brightness2,000 nits3,000 nits
Always-on displayYesYes
Display detailAlways-On Retina display with wide-angle OLEDs and LTPO3; 374 x 446 pixels (42mm) or 416 x 496 pixels (46mm) at 326 ppi; 989 or 1,220 sq mm display area; 1 nit minimum brightnessAlways-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 protectionIon-X front glass with a ceramic coating, 2x more scratch resistant than Series 10 (aluminium cases); sapphire front crystal (titanium cases)Flat sapphire crystal front
Health and fitness
ECGYesYes
Blood oxygenYesYes
Skin temperatureYesYes
Sleep apnoea alertsYesYes
High blood pressure alertsYesYes
Body compositionNoNo
Fall detectionYesYes
Crash detectionYesYes
GPSSingle-bandDual-band (L1 and L5)
Water resistance50 m100 m
SensorsElectrical heart sensor; third-generation optical heart sensor; blood oxygen sensor; temperature sensor; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope; ambient light sensor; depth gauge to 6 m; water temperature sensorHealth 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 featuresECG app; Blood Oxygen app; hypertension notifications; sleep apnoea notifications; irregular rhythm notifications; high and low heart rate notifications; Vitals app; sleep stages and sleep score; wrist temperature; Cycle Tracking with retrospective ovulation estimates; Medications; Mindfulness with state of mind tracking; NoiseReadiness 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 featuresCustom workouts; Training Load; heart rate zones; Race Route; Pacer; stride length, ground contact time and vertical oscillation; automatic track detection; multisport workouts; offline maps with custom route creation; Backtrack; pool and open-water swimming with SWOLF; cycling power zones with Bluetooth accessories; GymKitCustomisable 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 featuresEmergency SOS; international emergency calling; Crash Detection; Fall Detection; noise monitoring; BacktrackEmergency 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)Up to 24 hoursUp to 50 hours
In low-power modeUp to 38 hoursUp to 84 hours
Mobile data optionYesYes
Works withiPhoneiPhone
ChipS10S11
Storage64 GB64 GB
Battery life detailUp to 24 hours of normal use; up to 38 hours in Low Power ModeUp 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
ChargingFast charging to 80% in about 30 minutes; 15 minutes for up to 8 hours of normal use; 5 minutes for up to 8 hours of sleep trackingFast 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
ConnectivityWi-Fi 4 (802.11n) at 2.4GHz and 5GHz; Bluetooth 5.3; second-generation Ultra Wideband chip; NFC for Apple Pay; L1 GPS, GLONASS, Galileo, QZSS and BeiDou; GPS + Cellular models (A3335, A3337) with 5G RedCap and LTEGPS + 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)
Design
Weight (lightest version)29.7 g63 g
SoftwarewatchOSwatchOS
Case materials100% recycled aluminium or 100% recycled titanium case; water resistant to 50 m (ISO 22810:2010); IP6X dust resistantGrade 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
Size42mm is 42 x 36 x 9.7 mm; 46mm is 46 x 39 x 9.7 mm; lightest is the 42mm aluminium GPS + Cellular at 29.7 g, heaviest the 46mm titanium at 43.1 g49 x 44 x 12 mm; 63.0 g (natural) or 63.1 g (black)
BandsFits 130–200 mm wrists (42mm) or 140–245 mm wrists (46mm)Fits 130–210 mm wrists
ColoursAluminium in Jet Black, Rose Gold, Silver and Space Grey; titanium in Natural, Gold and SlateNatural or Black titanium
In the boxApple Watch Series 11, strap, 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)

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