Apple Watch Series 4

Apple Watch Series 4

Brand: Apple
Category: Wearables
  • Screen 1.57 inch/1.73 inch LTPO OLED Retina
  • Battery life 18 hours
  • Water resistance 5 ATM (50 metres)
  • Sensors Ambient light, optical heart rate sensor, Electrical heart sensor, improved accelerometer up to 32 g‑forces, improved gyroscope, GPS (GLONASS, Galileo, and QZSS), barometric altimeter, ambient light sensor, LTE (optional)
  • Date September 2018



Physical size 40 mm × 34 mm × 10.7 mm (1.57 in × 1.34 in × 0.42 in); 44 mm × 38 mm × 10.7 mm (1.73 in × 1.50 in × 0.42 in)
Material Sapphire crystal and ceramic back.
Charging Wireless charging
Battery Lithium-polymer
Battery life 18 hours
Water resistance 5 ATM (50 metres)
Weight Case weight: 30.1g (for 40mm version); 36.7g (for 44mm version)
Display type LTPO OLED Retina display with Force Touch (1000 nits), Ion-X strengthened glass
Display size 44mm: 1.73 inches, 40mm: 1.57 inches
Display resolution 44mm: (368 x 448 pixel resolution), 40mm: (324 x 394 pixel resolution)
Color options Space Black, Silver, Gold


Accelerometer Yes
Barometric altimeter Yes
Compass No
Galvanic skin response No
Geomagnetic No
Gyroscope Yes
Optical heart rate Yes
Electrical heart rate Yes
SpO2 No
Temperature No
Beidou No
Ambient light sensor Yes
Vibration motor Yes
Microphone Yes
Speakers Yes

Health & activity tracking

Steps Yes
Distance Yes
Calories burned Yes
Sports tracking Yes
Floors Yes
Sleep Yes
Heart rate Yes
Stress No
Blood oxygen No
Respiration rate No
UV exposure No
Skin temperature No
Hydration level No
Calorie intake No
Blood pressure No
Glucose No
Other - irregular heart rate detection - low or high heart rate alerts - fall detection

Daily smart features

Smartphone notifications Yes
Smartphone music control Yes
On-board music storage Yes
Connected pay Yes
Cellular Optional
Connectivity Bluetooth 5.0, Wi-Fi (802.11 b/g/n 2.4GHz only), UMTS cellular radio, LTE cellular data (optional)
Operating system WatchOS
Memory 1GB RAM, 16GB storage
Processor Apple S4 dual-core, W3 Apple wireless chip


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