Starting MSRP$399 (GPS) / $499 (5G)$399 (GPS) / $499 (LTE)$799$799$249 (GPS) / $299 (5G)$249 (GPS) / $299 (LTE)Sizes42mm / 46mm42mm / 46mm49mm49mm40mm / 44mm40mm / 44mmCase materialAluminum or titaniumAluminum or titaniumTitaniumTitaniumAluminumAluminumWeight (Grams)42mm: 30.3 (aluminum GPS) / 29.7 (aluminum 5G) / 34.6 (titanium)42mm: 30 (aluminum GPS) / 29.3 (aluminum LTE) / 34.4 (titanium)61.6 (natural / light gray) /61.8 (black)61.4 (natural / light gray) /61.8 (black)40mm: 26.3 (GPS) / 26.4 (cellular)44mm: 32.9 (GPS) / 33 (cellular)40mm: 26.4 (GPS) / 27.8 (cellular)44mm: 32.9 (GPS) / 33 (cellular)DisplayAlways-On Retina LTPO3 OLED / wide-angle OLEDAlways-On Retina LTPO3 OLED / wide-angle OLEDAlways-On Retina LTPO3 OLEDAlways-On Retina LTPO2 OLEDAlways-On Retina LTPO OLEDRetina LTPO OLEDScreen brightnessUp to 2000 nits brightnessUp to 2000 nits brightnessUp to 3000 nits brightnessUp to 3000 nits brightnessUp to 1000 nits brightnessUp to 1000 nits brightnessScreen resolution42mm: 374 x 44642mm: 374 x 446422 x 514410 x 50240mm: 324 x 39440mm: 324 x 39446mm: 416 x 49646mm: 416 x 49644mm: 368 x 44844mm: 368 x 448Minimum brightness1 nit1 nit1 nit1 nit2 nitsN/AProcessorS10 SiP with 64-bit dual-core processorS10 SiP with 64-bit dual-core processorS10 SiP with 64-bit dual-core processorS9 SiP with 64-bit dual-core processorS10 with 64-bit dual-core processorS8 with 64-bit dual-core processorUltra wideband chip (second-gen)YesYesYesYesNoNoOperating systemwatchOS 26watchOS 26watchOS 26watchOS 26watchOS 26watchOS 26Water resistanceWater resistant up to 50 metersWater resistant up to 50 metersWater resistant up to 100 metersWater resistant up to 100 metersWater resistant up to 50 metersWater resistant up to 50 metersDust resistanceIP6X-ratedIP6X-ratedIP6X-rated / Tested to MIL-STD 810HIP6X-rated / Tested to MIL-STD 810HN/AN/AConnectivityWi-Fi 4 (2.4 and 5GHz) + L1 GPS + Bluetooth 5.3Wi-Fi 4 + L1 GPS + Bluetooth 5.3Wi-Fi 4 (2.4 and 5GHz) + Precision dual-frequency (L1 and L5) GPS + Bluetooth 5.3 + 5GWi-Fi 4 + Precision dual-frequency (L1 and L5) GPS + Bluetooth 5.3 + LTEWi-Fi 4 (2.4GHz) + L1 GPS + Bluetooth 5.3Wi-Fi 4 + L1 GPS + Bluetooth 5.3Storage64GB64GB64GB64GB64GB32GBEstimated battery lifeUp to 24 hours; 38 hours in low-power modeUp to 18 hours; 36 hours in low-power modeUp to 42 hours; 72 hours in low-power modeUp to 36 hours; 72 hours in low-power modeUp to 18 hours; up to 36 hours in low-power modeUp to 18 hoursFast ChargingYes (80 percent in about 30 minutes)Yes (80 percent in about 30 minutes)Yes (80 percent in about 45 minutes)Yes (80 percent in about 1 hour)Yes (80 percent in about 45 minutes)NoDouble tap gestureYesYesYesYesYesNoWrist flick gestureYesYesYesYesYesNoSiriYes (on-device)Yes (on-device)Yes (on-device)Yes (on-device)Yes (on-device)YesApple PayYesYesYesYesYesYesSleep trackingYesYesYesYesYesYesSleep apnea notificationsYesYesYesYesYesNoCycle trackingYes with retrospective ovulation estimatesYes with retrospective ovulation estimatesYes with retrospective ovulation estimatesYes with retrospective ovulation estimatesYes with retrospective ovulation estimatesYes with retrospective ovulation estimatesHeart sensorThird-gen optical heart sensorThird-gen optical heart sensorThird-gen optical heart sensorThird-gen optical heart sensorSecond-gen optical heart sensorSecond-gen optical heart sensorElectrical heart sensor (ECG app)YesYesYesYesNoNoHypertension notificationsYesYesYesYesNoNoBlood oxygen appYesYesYesYesNoNoHigh, low, or irregular heart notificationsYesYesYesYesYesYesTemperature sensorYesYesYesYesYesNoCompassYesYesYesYesYesYesOffline mapsYesYesYesYesYesYesAlways-on altimeterYesYesYes with expanded operating range from (500m to 9,000m)Yes with expanded operating range from (500m to 9,000m)YesYesFall detectionYesYesYesYesYesYesCrash detectionYesYesYesYesYesYesEmergency SOSYesYesYesYesYesYesEmergency SOS via SatelliteNoNoYesNoNoNoBuilt-in mic and speakerYesYesYes, triple-mic array, dual speakersYes, triple-mic arrayYesYesMedia playbackYesYesYesYesYesNoSirenNoNoYesYesNoNoNight modeNoNoYesYesNoNoWater temperature and depth sensorsDepth gauge to 6m and water temperature sensor; Oceanic Plus app for snorkelingDepth gauge to 6m and water temperature sensor; Oceanic Plus app for snorkelingDepth gauge to 40m and water temperature sensor; Oceanic Plus app for use as a dive computerDepth gauge to 40m and water temperature sensor; Oceanic Plus app for use as a dive computerNoNoColorsAluminum: jet black, rose gold, and silver; Titanium: slate, gold, and naturalAluminum: jet black, rose gold, and silver; Titanium: slate, gold, and naturalNatural titanium and blackNatural titanium and blackMidnight, starlightMidnight, starlight, and silver