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Top specifications
eSIM compatibility
No
Heart rate sensor
Yes
Usage time
Standard: Up to 18 hours
Low Power Mode: Up to 36 hours
Device warranty
24 months
Design
Interchangeable strap
Yes
Battery
Usage time
Standard: Up to 18 hours
Low Power Mode: Up to 36 hours
Removable battery
No
Fast charge
Yes
Body
Weight (g)
Aluminium (41mm): Up to 32.1
Stainless Steel (41mm): 42.3
Aluminium (45mm): Up to 39
Stainless Steel (45mm): 51.5
Dimensions (mm)
41mm: 41x35x10.7 (HxWxD)
45mm: 45x38x10.7 (HxWxD)
Water resistant
Yes - up to 50m
Swimproof
Dust resistant
Yes - IP6X
Connectivity
Wi-Fi
Yes - 4
Bluetooth
Yes - 5.3
Processor
Model
S9 SiP with 64‑bit dual-core processor
Display
Brightness
Up to 2000 nits
Display type
Always-On Retina
Screen resolution
41mm: 352x430
45mm: 396x484
Network
VoLTE (4G calling in UK)
Yes
VoLTE (4G calling in UK)
Yes
Sensors
Menstrual tracker
Yes
Sensors
Accelerometer
Yes
Digital compass
Yes
Gyroscope
Yes
Blood oxygen sensor
Yes
Ambient light sensor
Yes
Heart rate sensor
Yes
Memory
Device memory
64GB
Features
Voice controls
Yes - Siri
App notifications
Yes
Messages & calls
Yes
Apple Pay
Yes
Navigation
Yes
Activity app
Yes
Special features
4-core Neural Engine
Second-generation Ultra Wideband chip
Carbon-neutral combinations
Gesture controls
Double tap
Speaker and microphone
Yes
eSIM compatibility
No
General features
Precision Finding for iPhone
Temperature sensing
Emergency SOS
Fall and Crash Detection
Sleep tracking
Mental wellbeing support
Noise monitoring
Backtrack
GymKit
Warranty
Device warranty
24 months
Face features
Timer
Yes
Weather
Yes
Stopwatch
Yes
Calendar
Yes
Custom faces
Yes
World clock
Yes
Control method
Digital crown
Yes
Side button
Yes
Touchscreen
Yes