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Apple Watch Ultra 4 vs Apple Watch SE 3 comparison

 Compare Apple Watch Ultra 4
Apple Watch Ultra 4
Compare Apple Watch SE 3
Apple Watch SE 3
key specs
Display Size49mm40mm
Dial ShapeRectangleSquare
Display TypeOLED RetinaOLED Retina
Ideal ForUnisexUnisex
Compatible OS-iOS 26
general
BrandAppleApple
ModelWatch Ultra 4Watch SE 3
Release dateSeptember 9, 2026September 9, 2025
Dial ShapeRectangleSquare
UsageRegular, Sports-
Ideal ForUnisexUnisex
Model Name-Watch SE 3
Dial Colour-Starlight, Midnight
Size-Regular
Touchscreen-Yes
Interchangeable Strap-Yes
Water Resistant-WR50
Water Resistance Depth-50
Dial Material-Aluminum
product details
SensorHealth Sensing System, optical and electrical heart sensors, blood oxygen sensor, temperature sensor, depth gauge, water temperature sensor, compass, always-on altimeter, high-g accelerometer, gyroscope, ambient light sensor-
Battery TypeRechargeable lithium-ion-
Battery Lifeup to 50 hoursUp to 24 hours
Charger TypeMagnetic charging portWireless
Rechargeable BatteryYes-
Compatible Device-iPhone 11 and above
connectivity features
Call FunctionYesYes
BluetoothYesYes
Wi-FiYesYes
GPSYesYes
Bluetooth Version-5.4
Messaging Support-Yes
platform and storage features
Operating SystemwatchOS 27watchOS 26
Processor NameApple S11 chipApple S10
Internal Memory64GB64GB
Compatible Operating System-iOS 26
camera and display features
Display Resolution422 × 514-
Display Size49mm40mm
Display TypeOLED RetinaOLED Retina
Scratch ResistantSapphire crystal-
Other Display Features3000 nits peak brightness, 1 nit minimum brightness, 1Hz refresh rate, 326ppi, Night Mode-
fitness and watch functions
Step CountYesYes
Calorie CountYesYes
Heart Rate MonitorYes-
AltimeterYes-
CompassYesYes
CalendarYesYes
Alarm ClockYesYes
ChronographYes-
Date & Time DisplayYesYes
LanguageEnglish-
Number of Buttons3-
Other Fitness FeaturesReadiness score, HRV, heart rate zones, Training Load, Workout Effort, VO2 max, custom workouts, race route, Pacer, cadence, stride length, running power, multisport workouts, cycling metrics, swimming metrics, diving, depth gauge, water temperature, GPS, elevation tracking, Backtrack and offline maps-
audio and video features
SpeakerYesYes
Gesture ControlYesYes
MicrophoneYesYes
Voice ControlSiri AIYes
dimensions
Width-34
Height-40
Thickness-10.7
Weight (g)-26.30
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