Apple Watch Series 7 (45mm) vs Apple Watch Series 1 (38mm) Specs Comparison

Display

Size
	1.5-inch
Resolution
448 x 368 px	340 x 272 px, 290 PPI
Technology
OLED	OLED
Screen-to-body
	55.12 %
Peak brightness
	450 cd/m2 (nit)
Features
	Pressure-sensitive, Ambient light sensor

Hardware

System chip
Apple S7	Apple S1P (28 nm)
Processor
Dual-core	Dual-core, 520 MHz, Cortex-A7
GPU
PowerVR	PowerVR G6200
RAM
1GB	0.5GB
Internal storage
32GB, not expandable	8GB, not expandable
OS
watchOS (9.x, 8.x)	watchOS (6.x, 5.1, 5, 4.x, 3.x)
Device type
Smartwatch	Smartwatch

Battery

Capacity
	205 mAh
Type
Li - Ion, Not user replaceable	Not user replaceable
Charging
Qi wireless charging	Magnetic charging

Camera

Design

Dimensions
	1.52 x 1.31 x 0.41 inches (38.6 x 33.3 x 10.5 mm)
Weight
1.34 oz(38.0 g)	0.88 oz(25.0 g)
Materials
Back: Aluminum	Back: Plastic Frame: Aluminum
Resistance
Water, Dust; IP6X	Yes; IPX7
Colors
Midnight, Starlight, Green, Blue, Red	Silver, Gold, Rose Gold, Gray

Cellular

3G
Bands 1(2100), 2(1900), 4(1700/2100), 5(850)
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s
SIM type
eSIM

Multimedia

Speakers
Loudspeaker	Loudspeaker
Additional microphone(s)
Yes

Connectivity & Features

Bluetooth
5.0	4.0
Wi-Fi
802.11 b,g,n	802.11 b,g,n
Location
A-GPS, Glonass, Galileo, BeiDou, QZSS
Sensors
Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer, Blood Oxygen	Accelerometer, Gyroscope, Heart rate
Other
	NFC

Availability

Officially announced
Sep 14, 2021

Alternative variants

With Stainless Steel case

Weight	1.82 oz(51.5 g)
Materials	Back: Stainless steel

With titanium case

Weight	1.59 oz(45.1 g)
Materials	Back: Titanium

Links

Full specifications
Apple Watch Series 7 (45mm) Specs	Apple Watch Series 1 (38mm) Specs
PhoneArena Review
Apple Watch Series 7 (45mm) Review