44mm Series4/5 vs
42mm Series3/2/1
40mm Series4/5 vs
38mm Series3/2/1
Apple Watch Series 5
40mm or 44mm case; over 30 percent larger display8
Always-On Retina LTPO OLED display with Force Touch, 1000 nits
GPS and GPS + Cellular models
S5 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 app1
International emergency calling,3 Emergency SOS,2and fall detection
Water resistant 50 meters4
LTE and UMTS,5 Wi-Fi, and Bluetooth 5.0
GPS/GNSS, compass, and barometric altimeter
50 percent louder speaker; built-in mic
32GB capacity
Apple Watch Series 4
40mm or 44mm case; over 30 percent larger display8
Retina LTPO OLED display with Force Touch, 1000 nits
GPS and GPS + Cellular models
S4 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 app1
Emergency SOS2 and fall detection
Water resistant 50 meters4
LTE and UMTS,5 Wi-Fi, and Bluetooth 5.0
GPS/GNSS and barometric altimeter
50 percent louder speaker; built-in mic
16GB capacity
Apple Watch Series 3
38mm or 42mm case
Second-generation Retina OLED display with Force Touch, 1000 nits
GPS and GPS + Cellular models
S3 with dual-core processor; W2 wireless chip
Digital Crown
Optical heart sensor
High and low heart rate notifications and irregular heart rhythm notification
Emergency SOS2
Water resistant 50 meters4
LTE and UMTS,5 Wi-Fi, and Bluetooth 4.2
GPS/GNSS and barometric altimeter
Built-in speaker and mic
16GB capacity (GPS + Cellular); 8GB capacity (GPS)
Apple Watch Series 2
38mm or 42mm case
Second-generation Retina OLED display with Force Touch
GPS model
S2 with dual-core processor
Digital Crown
Optical heart sensor
High and low heart rate notifications and irregular heart rhythm notification
Water resistant 50 meters4
Wi-Fi and Bluetooth 4.0
GPS/GNSS
Built-in speaker and mic
8GB capacity
Apple Watch Series 1
38mm or 42mm case
Retina OLED display with Force Touch
S1P with dual-core processor
Digital Crown
Optical heart sensor
High and low heart rate notifications and irregular heart rhythm notification
Splash resistant9
Wi-Fi and Bluetooth 4.0
Built-in speaker and mic
8GB capacity
