• 45mm

• Height: 45mm

• Width: 38mm

• Depth: 10.7mm

• Weight (aluminum, GPS): 38.7 grams

• Weight (aluminum, GPS + Cellular): 39.0 grams

• Weight (stainless steel): 51.5 grams

• Fits 140–245mm wrists

• 41mm

• Height: 41mm

• Width: 35mm

• Depth: 10.7mm

• Weight (aluminum, GPS): 31.9 grams

• Weight (aluminum, GPS + Cellular): 32.1 grams

• Weight (stainless steel): 42.3 grams

• Fits 130–200mm wrists

Hardware and Buttons on Apple Watch Series 9 41mm

• Digital Crown

• Microphone

• Side button

• Electrical heart sensor

• Speaker/air vent

• Optical heart sensor

Controls on Apple Watch Series 9 41mm

• Digital Crown with haptic feedback

• Side button

• Double tap gesture

• Siri with on‑device processing

Chip

• S9 SiP with 64‑bit dual‑core processor

• 4‑core Neural Engine

• 64GB capacity

Sensors

• Electrical heart sensor

• Third‑generation optical heart sensor

• Temperature sensing¹

• Compass

• Always‑on altimeter

• High‑g accelerometer

• High dynamic range gyroscope

• Ambient light sensor

Health and Wellness

• ECG app²

• Cycle Tracking app with retrospective ovulation estimates³

• Heart Rate app

• High and low heart rate notifications

• Irregular rhythm notifications⁴

• Medications app

• Mindfulness app

• Noise app

• Sleep app including sleep stages

Display on  Apple Watch Series 9 41mm

• Always‑On Retina LTPO OLED display

• Edge‑to‑edge display

• Ion‑X front glass (aluminum cases)

• Sapphire front crystal (stainless steel cases)

• Up to 2000 nits maximum brightness

• 1 nit minimum brightness

• 326 pixels per inch

Power and Battery Life on Apple Watch Series 9 41mm

• All‑day battery life, up to 18 hours of normal use⁵

• Up to 36 hours in Low Power Mode⁵

• Built‑in rechargeable lithium‑ion battery

• Fast‑charge capable⁶

• Up to 80% charge in about 45 minutes⁶

Operating System

watchOS

watchOS is the world’s most advanced wearable operating system, with apps and features designed to keep you active, healthy, safe, and connected.

• Running

• Custom interval workouts

• Customizable Workout Views

• Heart Rate Zones

• Race Route

• Stride length, ground contact time, and vertical oscillation

• Automatic track detection

• Multisport workout

• Hiking

• Bearing, incline, elevation, and coordinates

• Custom waypoints

• Automatically generated waypoints to cellular connectivity

• Backtrack GPS data

• Topographic maps for over 1000 national and regional parks (U.S. only)

• Cycling

• Average speed, elevation gained, and distance

• Connection to cycling accessories via Bluetooth

• Functional Threshold Power

• Power Zones

• Cadence

• Live Activity on iPhone

• Swimming

• Pool swim or open water swim

• Splits and auto sets

• SWOLF score

• Automatic stroke detection

• Kickboard

• Average pace, total distance, and laps