Apple Watch Series 3 (38mm) vs Apple Watch Series 7 (41mm) 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 (38mm)
Apple Watch Series 3 (38mm) Apple Watch Series 7 (41mm)
Released · 2017
Released · Oct 15, 2021
1.5-inch · 340 x 272 px
448 x 368 px
768GB · 16GB
1GB · 32GB
279 mAh

Display

Size
1.5-inch
Resolution
340 x 272 px, 290 PPI 448 x 368 px
Technology
OLED OLED
Screen-to-body
55.12 %
Peak brightness
1000 cd/m2 (nit)
Features
Pressure-sensitive, Scratch-resistant glass (Sapphire)

Hardware

System chip
Apple S3 Apple S7
Processor
Dual-core Dual-core
GPU
PowerVR PowerVR
RAM
768GB 1GB
Internal storage
16GB 32GB, not expandable
OS
watchOS (8.x, 7.x, 6.1, 6.x, 5.1, 5, 4.x) watchOS (9.x, 8.x)
Device type
Smartwatch Smartwatch

Battery

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

Camera

Design

Dimensions
1.52 x 1.31 x 0.45 inches
(38.6 x 33.3 x 11.4 mm)
Weight
1.50 oz(42.4 g) 1.13 oz(32.0 g)
Materials
Back: Ceramic
Frame: Stainless steel
Back: Aluminum
Resistance
Water, Dust Water, Dust; IP6X
Colors
Space Black, Silver Midnight, Starlight, Green, Blue, Red

Cellular

4G (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800 Lower), 19(800 Upper), 20(800 DD), 26(850+)
3G
Bands 1(2100), 5(850), 8(900) Bands 1(2100), 2(1900), 4(1700/2100), 5(850)
Data Speed
LTE, HSDPA+ (4G) 42.2 Mbit/s LTE-A, HSDPA+ (4G) 42.2 Mbit/s
SIM type
eSIM eSIM

Multimedia

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

Connectivity & Features

Bluetooth
4.2 5.0
Wi-Fi
802.11 b,g,n 802.11 b,g,n
Location
A-GPS, Glonass A-GPS, Glonass, Galileo, BeiDou, QZSS
Sensors
Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer, Blood Oxygen
Other
NFC

Availability

Officially announced
Sep 14, 2021

Alternative variants

With Stainless Steel case
Weight 1.49 oz(42.3 g)
Materials Back: Stainless steel
Colors Graphite, Silver, Gold
With Titanium case
Weight 1.31 oz(37.0 g)
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