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Apple Watch

40mm or 44mm case; over 30% larger display10
Always-On Retina LTPO OLED display, 1,000 nits
Ion-X glass display on aluminium cases; sapphire crystal display on stainless steel and titanium cases
GPS and GPS + Cellular models
S6 SiP with 64-bit dual-core processor; W3 wireless chip; U1 chip (Ultra Wideband)
Digital Crown with haptic feedback
Blood oxygen sensor; electrical heart sensor and third-generation optical heart sensor
High and low heart rate notifications, irregular heart rhythm notification and ECG app3
International emergency calling,5 Emergency SOS4 and fall detection
Water resistant to 50 metres1
LTE and UMTS,6 Wi-Fi and Bluetooth 5.0
GPS/GNSS, compass and always-on altimeter
50% louder speaker10; built-in mic
32GB capacity

40mm or 44mm case; over 30% larger display10
Always-On Retina LTPO OLED display, 1,000 nits
Ion-X glass display on aluminium cases; sapphire crystal display on stainless steel, titanium and ceramic cases
GPS and GPS + Cellular models
S5 SiP with 64-bit dual-core processor; W3 wireless chip
Digital Crown with haptic feedback
Electrical heart sensor and second-generation optical heart sensor
High and low heart rate notifications, irregular heart rhythm notification and ECG app3
International emergency calling,5 Emergency SOS4 and fall detection
Water resistant to 50 metres1
LTE and UMTS,6 Wi-Fi and Bluetooth 5.0
GPS/GNSS, compass and barometric altimeter
50% louder speaker10; built-in mic
32GB capacity

40mm or 44mm case; over 30% larger display10
Retina LTPO OLED display, 1,000 nits
Ion-X glass display on aluminium cases; sapphire crystal display on stainless steel cases
GPS and GPS + Cellular models
S4 SiP with 64-bit dual-core processor; W3 wireless chip
Digital Crown with haptic feedback
Electrical heart sensor and second-generation optical heart sensor
High and low heart rate notifications, irregular heart rhythm notification and ECG app3
Emergency SOS4 and fall detection
Water resistant to 50 metres1
LTE and UMTS,6 Wi-Fi and Bluetooth 5.0
GPS/GNSS and barometric altimeter
50% louder speaker10; built-in mic
16GB capacity

38mm or 42mm case
Second-generation Retina OLED display, 1,000 nits
Ion-X glass display on aluminium cases; sapphire crystal display on stainless steel and ceramic cases
GPS model
S3 SiP with dual-core processor; W2 wireless chip
Digital Crown
Optical heart sensor
High and low heart rate notifications and irregular heart rhythm notification3
Emergency SOS4
Water resistant to 50 metres1
Wi-Fi and Bluetooth 4.2
GPS/GNSS and barometric altimeter
Built-in speaker and mic
8GB capacity

38mm or 42mm case
Second-generation Retina OLED display
Ion-X glass display on aluminium cases; sapphire crystal display on stainless steel and ceramic cases
GPS model
S2 with dual-core processor
Digital Crown
Optical heart sensor
High and low heart rate notifications and irregular heart rhythm notification3
Water resistant to 50 metres1
Wi-Fi and Bluetooth 4.0
GPS/GNSS
Built-in speaker and mic
8GB capacity