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Apple Watch Series 1 (38mm) vs Apple Watch Series 1 (42mm) 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.

Comparison mode:
Specs Size
Differences only
Apple Watch Series 1 (38mm)
Apple Watch Series 1 (42mm)
Apple Watch Series 1 (38mm) Apple Watch Series 1 (42mm)
Released · April 2015
Released · April 2015
1.5-inch · 340x272px
1.6-inch · 390x312px
0.5GB · 8GB
0.5GB · 8GB
205 mAh
250 mAh

Design

Dimensions
1.52 x 1.31 x 0.41 inches
38.6 x 33.3 x 10.5 mm 		1.67 x 1.43 x 0.41 inches
42.5 x 36.4 x 10.5 mm
Weight
0.88 oz / 25.0 g 0.88 oz / 25.0 g
Materials
Back: Plastic
Frame: Aluminum 		Back: Plastic
Frame: Aluminum
Resistance
Yes; IPX7 Yes; IPX7
Colors
Silver, Gold, Rose Gold, Gray Silver, Gold, Rose Gold, Gray

Display

Size
1.5-inch, 55.12% screen-to-body 1.6-inch, 55.61% screen-to-body
Type
OLED, 450 nits OLED, 450 nits
Resolution
340x272px, 290 PPI 390x312px, 303 PPI
Features
Pressure-sensitive, Ambient light sensor Pressure-sensitive, Ambient light sensor

Hardware

System chip
Apple S1P (28 nm) Apple S1P (28 nm)
Processor
Dual-core
520 MHz
Cortex-A7 		Dual-core
520 MHz
Cortex-A7
GPU
PowerVR G6200 PowerVR G6200
Memory
0.5GB/8GB 0.5GB/8GB
Storage expansion
not expandable not expandable
OS
watchOS (6.x, 5.1, 5, 4.x, 3.x) watchOS (6.x, 5.1, 5, 4.x, 3.x)

Battery

Type
205 mAh 250 mAh
Charging
Magnetic charging Magnetic charging

Connectivity & Features

Bluetooth
4.0 4.0
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, Ambient light sensor
Other
NFC NFC

Multimedia

Speakers
Loudspeaker Loudspeaker
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