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Apple Watch Series 9Apple Watch Ultra 2Apple Watch SEApple Watch Series 8Apple Watch UltraApple Watch Series 7Apple Watch Series 6Apple Watch SE (1st generation)Apple Watch Series 5Apple Watch Series 4Apple Watch Series 3Apple Watch Series 2Apple Watch Series 1
41mm or 45mm case49mm case40mm or 44mm case41mm or 45mm case49mm case41mm or 45mm case40mm or 44mm case40mm or 44mm case40mm or 44mm case40mm or 44mm case38mm or 42mm case38mm or 42mm case38mm or 42mm case
Always-On Retina LTPO OLED display, up to 2000 nitsAlways-On Retina LTPO OLED display, up to 3000 nitsRetina LTPO OLED display, up to 1000 nitsAlways-On Retina LTPO OLED display, up to 1000 nitsAlways-On Retina LTPO OLED display, up to 2000 nitsAlways-On Retina LTPO OLED display, up to 1000 nitsAlways-On Retina LTPO OLED display, up to 1000 nitsRetina LTPO OLED display, up to 1000 nitsAlways-On Retina LTPO OLED display, up to 1000 nitsRetina LTPO OLED display, up to 1000 nitsSecond-generation Retina OLED display, up to 1000 nitsSecond-generation Retina OLED displayRetina OLED display
Ion-X glass display on aluminum cases; sapphire crystal display on stainless steel casesFlat sapphire crystal displayIon-X glass displayIon-X glass display on aluminum cases; sapphire crystal display on stainless steel casesFlat sapphire crystal displayIon-X glass display on aluminum cases; sapphire crystal display on stainless steel and titanium casesIon-X glass display on aluminum cases; sapphire crystal display on stainless steel and titanium casesIon-X glass displayIon-X glass display on aluminum cases; sapphire crystal display on stainless steel, titanium, and ceramic casesIon-X glass display on aluminum cases; sapphire crystal display on stainless steel casesIon-X glass display on aluminum cases; sapphire crystal display on stainless steel and ceramic casesIon-X glass display on aluminum cases; sapphire crystal display on stainless steel and ceramic casesIon-X glass display
GPS and GPS + Cellular modelsGPS + Cellular modelGPS and GPS + Cellular modelsGPS and GPS + Cellular modelsGPS + Cellular modelGPS and GPS + Cellular modelsGPS and GPS + Cellular modelsGPS and GPS + Cellular modelsGPS and GPS + Cellular modelsGPS and GPS + Cellular modelsGPS modelGPS model
S9 SiP with 64-bit dual-core processor; W3 wireless chip; second-generation Ultra Wideband chip25S9 SiP with 64-bit dual-core processor; W3 wireless chip; second-generation Ultra Wideband chip25S8 SiP with 64-bit dual-core processor; W3 wireless chipS8 SiP with 64-bit dual-core processor; W3 wireless chip; U1 chip (Ultra Wideband)S8 SiP with 64-bit dual-core processor; W3 wireless chip; U1 chip (Ultra Wideband)S7 SiP with 64-bit dual-core processor; W3 wireless chip; U1 chip (Ultra Wideband)S6 SiP with 64-bit dual-core processor; W3 wireless chip; U1 chip (Ultra Wideband)S5 SiP with 64-bit dual-core processor; W3 wireless chipS5 SiP with 64-bit dual-core processor; W3 wireless chipS4 SiP with 64-bit dual-core processor; W3 wireless chipS3 SiP with dual-core processor; W2 wireless chipS2 with dual-core processorS1P with dual-core processor
Digital Crown with haptic feedback; side button; double tap gesture; on-device SiriDigital Crown with haptic feedback; side button; Action button; double tap gesture; on-device SiriDigital Crown with haptic feedback; SiriDigital Crown with haptic feedback; SiriDigital Crown with haptic feedback; side button; Action button; SiriDigital Crown with haptic feedback; SiriDigital Crown with haptic feedbackDigital Crown with haptic feedbackDigital Crown with haptic feedbackDigital Crown with haptic feedbackDigital CrownDigital CrownDigital Crown
Temperature sensor, electrical heart sensor and third-generation optical heart sensorTemperature sensor; electrical heart sensor and third-generation optical heart sensor; depth gauge; water temperature sensorSecond-generation optical heart sensorTemperature sensor, electrical heart sensor and third-generation optical heart sensorTemperature sensor; electrical heart sensor and third-generation optical heart sensor; depth gauge; water temperature sensorElectrical heart sensor and third-generation optical heart sensorElectrical heart sensor and third-generation optical heart sensorSecond-generation optical heart sensorElectrical heart sensor and second-generation optical heart sensorElectrical heart sensor and second-generation optical heart sensorOptical heart sensorOptical heart sensorOptical heart sensor
High and low heart rate notifications, irregular rhythm notification, and ECG app31; sleep stagesHigh and low heart rate notifications, irregular rhythm notification, and ECG app31; sleep stagesHigh and low heart rate notifications and irregular rhythm notification4; sleep stagesHigh and low heart rate notifications, irregular rhythm notification, and ECG app; sleep stagesHigh and low heart rate notifications, irregular rhythm notification, and ECG app; sleep stagesHigh and low heart rate notifications, irregular rhythm notification, and ECG app; sleep stagesHigh and low heart rate notifications, irregular rhythm notification, and ECG app; sleep stagesHigh and low heart rate notifications, irregular rhythm notification4; sleep stagesHigh and low heart rate notifications, irregular rhythm notification, and ECG app; sleep stagesHigh and low heart rate notifications, irregular rhythm notification, and ECG app; sleep stagesHigh and low heart rate notifications and irregular rhythm notificationHigh and low heart rate notifications and irregular rhythm notificationHigh and low heart rate notifications and irregular rhythm notification
International emergency calling, Emergency SOS, Crash Detection, and Fall DetectionInternational emergency calling, Emergency SOS, Crash Detection, and Fall Detection; SirenInternational emergency calling, Emergency SOS, Crash Detection, and Fall DetectionInternational emergency calling, Emergency SOS, Crash Detection, and Fall DetectionInternational emergency calling, Emergency SOS, Crash Detection, and Fall Detection; SirenInternational emergency calling, Emergency SOS, and Fall DetectionInternational emergency calling, Emergency SOS, and Fall DetectionInternational emergency calling, Emergency SOS, and Fall DetectionInternational emergency calling, Emergency SOS, and Fall DetectionEmergency SOS and Fall DetectionEmergency SOS
Water resistant 50 meters10Water resistant 100 meters11Water resistant 50 metersWater resistant 50 metersWater resistant 100 meters11Water resistant 50 metersWater resistant 50 metersWater resistant 50 metersWater resistant 50 metersWater resistant 50 metersWater resistant 50 metersWater resistant 50 metersSplash resistant36
Recreational dive to 40 metersRecreational dive to 40 meters
Dust resistant (IP6X)Dust resistant (IP6X)Dust resistant (IP6X)Dust resistant (IP6X)
LTE and UMTS,12 Wi-Fi 4 (802.11n), and Bluetooth 5.3LTE and UMTS,12 Wi-Fi 4 (802.11n), and Bluetooth 5.3LTE and UMTS,12 Wi-Fi 4 (802.11n), and Bluetooth 5.3LTE and UMTS,12 Wi-Fi 4 (802.11n), and Bluetooth 5.3LTE and UMTS,12 Wi-Fi 4 (802.11n), and Bluetooth 5.3LTE and UMTS,12 Wi-Fi, and Bluetooth 5.0LTE and UMTS,12 Wi-Fi, and Bluetooth 5.0LTE and UMTS,12 Wi-Fi, and Bluetooth 5.0LTE and UMTS,12 Wi-Fi, and Bluetooth 5.0LTE and UMTS,12 Wi-Fi, and Bluetooth 5.0Wi-Fi and Bluetooth 4.2Wi-Fi and Bluetooth 4.0Wi-Fi and Bluetooth 4.0
GPS/GNSS, compass, and always-on altimeterGPS/GNSS, compass, and always-on altimeterGPS/GNSS, compass, and always-on altimeterGPS/GNSS, compass, and always-on altimeterGPS/GNSS, compass, and always-on altimeterGPS/GNSS, compass, and always-on altimeterGPS/GNSS, compass, and always-on altimeterGPS/GNSS, compass, and always-on altimeterGPS/GNSS, compass, and barometric altimeterGPS/GNSS and barometric altimeterGPS/GNSS and barometric altimeterGPS/GNSS
Built-in speaker and micDual speakers and three-mic array with beamformingBuilt-in speaker and micBuilt-in speaker and micDual speakers and three-mic array with beamformingBuilt-in speaker and micBuilt-in speaker and micBuilt-in speaker and micBuilt-in speaker and micBuilt-in speaker and micBuilt-in speaker and micBuilt-in speaker and micBuilt-in speaker and mic
64GB capacity64GB capacity32GB capacity32GB capacity32GB capacity32GB capacity32GB capacity32GB capacity32GB capacity16GB capacity8GB capacity8GB capacity8GB capacity
Fast charge timeFast charge timeFast charge timeFast charge timeFast charge time
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