Apple Watch Series 10 Apple Watch Ultra 2Apple Watch SE (2nd Gen)Shape SquareSquareRectangularWatch size 42mm, 46mm49mm40mm, 44mmMaterials, finishes Aluminum, titaniumTitaniumAluminum, Midnight, Starlight, SilverDisplay size, resolution 42mm: 1.65-inch OLED 446 x 374 pixels; 46mm: 1.81-inch 496 x 416 pixels1.91-inch, 502 x 410-pixel OLED40mm: 324 x 394, 44mm: 368 x 448Dimensions 42mm: 42 x 36 x 9.7mm; 46mm: 46 x 39 x 9.7mm44mm x 49mm x 14.4mm40mm: 40 x 34 x 10.7 mm, 44mm: 44 x 38 x 10.7 mmWeight 42mm (Wi-Fi): 30 g; 42mm (cellular): 29.3 g; 42mm (titanium): 34.4 g; 46mm (Wi-Fi): 36.4 g; 46mm (cellular): 35.3 g; 46mm (titanium): 41.7 g61.4g40mm GPS: 26.4g, 40mm Cellular: 27.8g, 44mm GPS: 32.9g, 44mm Cellular: 33gColors Jet black, rose gold, silver; titanium: slate, gold, naturalNatural titaniumMidnight, Starlight, SilverAlways On YesYesNoInterchangeable bands YesYesYesGPS YesYes (L1 and L5)YesAutomatic workout detection YesYesYesCompass YesYesYesAltimeter YesYes (operating range: -500m to 9,000m)Always-on altimeterWater/Dust resistance Water resistant up to 50m (5ATM), IP6X (dust)10ATM (100 meters) and recreational scuba diving up to 40 metersWater resistant up to 50m (5ATM)Calls YesYesYes (Cellular only)Microphone YesYes (3-mic array)YesSpeaker YesYesYesVoice assistant Yes (Siri)Yes (Siri, on-device)SiriMobile Payments Yes (Apple Pay)Yes (Apple Pay)Ys (Apple Pay)Sleep tracking YesYesYesPeriod tracking YesYesYesSensors Accelerometer, altimeter, gyro sensor, temperature sensor, compass, third-gen optical heart sensor, electrical heart sensor, ambient light sensor, depth gauge, water temperature sensorSPo2 (blood oxygen), ECG, optical heart, ambient light, high dynamic range gyroscope, high-g accelerometer, water temperature, depth gauge + appSecond-gen optical heart sensor, accelerometer, High dynamic range gyroscope, Compass, Always-on altimeter, Ambient light sensorEmergency features Fall detection, crash detection, Emergency SOS, international emergency calling, noise monitoring, BacktrackInternational emergency calling, Emergency SOS, crash detectionEmergency SOS, International emergency calling, Crash Detection, Fall Detection, Noise monitoring, BacktrackCompatibility iOS 18 and neweriOS 17iPhone 8 or later with iOS 16 and newerSoftware WatchOS 11WatchOS 11WatchOS 11Processor S10 SiP with 64‑bit dual core processor, 4‑core Neural EngineApple S9S8 SiP, 64-bit dual-core, 2-core Neural EngineConnectivity Bluetooth 5.3, 2nd gen Ultra Wideband chipLTE and UMTS, Wi-Fi 4, Bluetooth 5.3Bluetooth 5.3, LTE/UMTS (Cellular model)Memory and storage 64GB64GB32GBCharging USB-C fast charging cableUSB-C magnetic fast chargingMagnetic charging cable, 80% in ~1.5 hoursBattery life Up to 18 hours normal use; up to 36 hours in low power modeUp to 36 hours; up to 72 hours (low power mode)Up to 18 hoursBattery capacity Wi-Fi 4 (802.11n)UnavailableNot specifiedUS price 42mm: $399 (Wi-Fi); 42mm: $499 (cellular); 42mm: $699 (titanium); 46mm: $429 (Wi-Fi); 46mm: $529 (cellular); 46mm: $749 (titanium)$79940mm GPS: $249, 44mm GPS: $279 40mm GPS + Cellular: $299, 44mm GPS + Cellular: $329UK price 42mm: £399 (Wi-Fi); 42mm: £499 (cellular); 42mm: £699 (titanium); 46mm: £429 (Wi-Fi); 46mm: £529 (cellular); 46mm: £749 (titanium)£79940mm GPS: £219, 44mm GPS: £249, 40mm GPS + Cellular: £269, 44mm GPS + Cellular: £299Australian price 42mm: AU$649 (Wi-Fi); 42mm: AU$809 (cellular); 42mm: AU$1,199 (titanium); 46mm: AU$699 (Wi-Fi/Bluetooth); 46mm: AU$859 (cellular); 46mm: AU$1,279 (titanium)AU$1,39940mm GPS: A$399, 44mm GPS: A$449, 40mm GPS + Cellular: A$479, 44mm GPS + Cellular: A$529