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Apple Watch Series 2 (42mm) vs Apple Watch Series 4 (44mm) Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.


Apple Watch Series 2 (42mm)	Apple Watch Series 4 (44mm)
Released · September 2016	Released · September 2018
1.6-inch	1.8-inch
0.5GB · 8GB	1GB · 16GB
334 mAh	292 mAh

Design

Dimensions
1.67 x 1.31 x 0.45 inches 42.5 x 33.3 x 11.4 mm	1.73 x 1.50 x 0.42 inches 44.0 x 38.0 x 10.7 mm
Weight
1.85 oz (52.4 g)	1.29 oz (36.7 g)
Materials
Frame: Stainless steel	Frame: Aluminum
Resistance
Water	Water
Colors
Silver, Black	Silver, Black

Display

Size
1.6-inch, 60.71% screen-to-body	1.8-inch, 59.89% screen-to-body
Type
OLED, 1000 nits	OLED, 1000 nits
Resolution
390x312px, 303 PPI	448x368px, 326 PPI
Protection
	Sapphire
Features
Pressure-sensitive, Ambient light sensor	Pressure-sensitive, Scratch-resistant glass, Ambient light sensor

Hardware

System chip
Apple S2 (16 nm)	Apple S4 (7 nm)
Processor
Dual-core 780 MHz Cortex-A7	Dual-core
GPU
PowerVR G6200	Apple G11M
Memory
0.5GB/8GB	1GB/16GB
Storage expansion
not expandable	not expandable
OS
watchOS (6.x, 5.1, 5, 4.x, 3.x)	watchOS (9.x, 8.x, 7.x, 6.x, 5)

Battery

Type
334 mAh	292 mAh
Charging
Magnetic charging	Magnetic charging

Camera

Connectivity & Features

Bluetooth
4.0	5.0
WLAN
b,g,n 802.11 b, g, n	b,g,n 802.11 b, g, n
Sensors
Accelerometer, Gyroscope, Heart rate, Ambient light sensor	Accelerometer, Gyroscope, Heart rate, Barometer, Ambient light sensor
Location
Glonass, Galileo	Glonass, Galileo, QZSS
Other
NFC	NFC

Multimedia

Speakers
Loudspeaker	Loudspeaker
Additional microphone(s)
	Noise cancellation

Cellular

Data Speed
	LTE, HSPA
SIM type
	eSIM

Alternative variants

With aluminum frame


Weight	1.21 oz (34.2 g)
Materials	Frame: Aluminum

Links

Full specifications
Apple Watch Series 2 (42mm) Specs	Apple Watch Series 4 (44mm) Specs