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

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

Availability

Officially announced
Sep 12, 2023

Design

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

Display

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

Hardware

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

Battery

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

Camera

Connectivity & Features

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

Multimedia

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

Cellular

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