Apple Watch Series 3 (42mm) vs Apple Watch Series 9 (45mm) 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.

7.0
Apple Watch Series 3 (42mm)
9.0
Apple Watch Series 9 (45mm)
Apple Watch Series 3 (42mm) Apple Watch Series 9 (45mm)
Released · 2017
Released · Sep 22, 2023
1.6-inch
1.7-inch
768GB · 16GB
1GB · 64GB
341 mAh
308 mAh
Check prices

Availability

Officially announced
Sep 12, 2023

Design

Dimensions
1.67 x 1.43 x 0.45 inches
42.5 x 36.4 x 11.4 mm
1.61 x 1.38 x 0.42 inches
41 x 35 x 10.7 mm
Weight
1.86 oz (52.8 g) 1.82 oz (51.5 g)
Materials
Back: Ceramic
Frame: Stainless steel
Back: Ceramic
Frame: Aluminum
Resistance
Water, Dust Water, Dust; IP6X
Colors
Space Black, Silver Midnight, Starlight, Green, Blue, Red

Display

Size
1.6-inch, 55.61% screen-to-body 1.7-inch, 63.01% screen-to-body
Type
OLED, 1000 nits OLED, 1000 nits
Resolution
390x312px, 303 PPI 430x352px, 329 PPI
Protection
Sapphire
Features
Pressure-sensitive, Scratch-resistant glass

Hardware

System chip
Apple S3 Apple S9
Processor
Dual-core Dual-core
GPU
PowerVR PowerVR
Memory
768GB/16GB 1GB/64GB
Storage expansion
not expandable
OS
watchOS (8.x, 7.x, 6.1, 6.x, 5.1, 5, 4.x) watchOS (10.x)

Battery

Type
341 mAh 308 mAh, Li - Ion
Charging
Qi wireless charging Qi wireless charging

Camera

Connectivity & Features

Bluetooth
4.2 Yes
WLAN
b,g,n
802.11 b, g, n
b,g,n
802.11 b, g, n
Sensors
Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Thermometer, Barometer, ECG, Blood Oxygen
Location
A-GPS, Glonass A-GPS, Glonass, Galileo, BeiDou, QZSS
Other
NFC NFC, Ultra Wideband (UWB)

Multimedia

Headphones
No 3.5mm jack
Speakers
Loudspeaker Loudspeaker
Additional microphone(s)
Yes

Cellular

4G (FDD) Bands
1, 3, 5, 7, 8, 18, 19, 20, 26 1, 2, 3, 4, 5, 7, 8, 18, 19, 20, 25, 26, 28, 66
4G (TDD) Bands
39, 40, 41
3G Bands
1, 5, 8 1, 2, 4, 5
Data Speed
LTE, HSDPA+ (4G) 42.2 Mbit/s LTE, HSDPA+ (4G) 42.2 Mbit/s
SIM type
eSIM eSIM
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