Starting price$399$279$399$199ProcessorS6 dual-core processorS5 dual-core processorS5 dual-core processorS3 dual-core processorwatchOS versionwatchOS 7watchOS 7watchOS 7watchOS 7Water resistanceWater resistant up to 50 metersWater resistant up to 50 metersWater resistant up to 50 metersWater resistant up to 50 metersConnectivityWi-Fi, GPS, Bluetooth 5.0Wi-Fi, GPS, Bluetooth 5.0Wi-Fi, GPS, Bluetooth 5.0Wi-Fi, GPS, Bluetooth 4.2LTEYes, $499Yes, $329Yes, but hard to findYes, but hard to findBuilt-in mic and speakerYesYesYesYesW-series Wireless chipW3W3W3W2U1 Ultra Wideband supportYesNoNoNoAlways-on altimeterYesYesNo, but still has an altimeterNo, but still has an altimeterCompassYesYesYesNoDigital Crown haptic feedbackYesYesYesNoHeart sensorsecond-gen optical heart sensoroptical heart sensorsecond-gen optical heart sensoroptical heart sensorCase sizes44mm, 40mm44mm, 40mm44mm, 40mm38mm, 42mmDisplayAlways-on OLED Retina displayOLED Retina displayAlways-on OLED Retina displayOLED Retina displayDisplay size (approx.)44mm: 1.78-inch, 40mm: 1.57-inch44mm: 1.78-inch, 40mm: 1.57-inch44mm: 1.78-inch, 40mm: 1.57-inch42mm: 1.65-inch, 38mm: 1.5-inchScreen resolution44mm: 368 x 448, 40mm: 324 x 39444mm: 368 x 448, 40mm: 324 x 39444mm: 368 x 448, 40mm: 324 x 39442mm: 312 x 390, 38mm: 272 x 340Storage32GB32GB32GB8GBBattery LifeUp to 18 hoursUp to 18 hoursUp to 18 hoursUp to 18 hoursFamily Setup supportYes, with cellular versionYes, with cellular versionYes, with cellular versionNoFall detection?YesYesYesNoEmergency SOSYesYesYesYesECG appYesNoYesNoBlood Oxygen appYesNoNoNoNoise monitoringYesYesYesNoHigh, low, or irregular heart notificationsYesYesYesYesOptical heart sensorYesYesYesYes

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