Apple Watch Series 11 vs Apple Watch Series 9

Every spec side by side, from each maker's published figures.

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Watch Series 11 compared with Watch Series 9

	AppleWatch Series 11	AppleWatch Series 9
Overview
Released
Released	September 2025	September 2023
Display
Case sizes
Case sizes	42 mm or 46 mm	41 mm or 45 mm
Panel
Panel	LTPO OLED	LTPO OLED
Peak brightness
Peak brightness	2,000 nits	2,000 nits
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	Always-On Retina display with wide-angle OLEDs and LTPO3; 374 x 446 pixels (42mm) or 416 x 496 pixels (46mm) at 326 ppi; 989 or 1,220 sq mm display area; 1 nit minimum brightness	Always-On Retina LTPO OLED display, edge to edge; 326 ppi; up to 2,000 nits maximum and 1 nit minimum brightness
Screen protection
Screen protection	Ion-X front glass with a ceramic coating, 2x more scratch resistant than Series 10 (aluminium cases); sapphire front crystal (titanium cases)	Ion-X front glass (aluminium cases); sapphire front crystal (stainless steel cases)
Health and fitness
ECG
ECG	Yes	Yes
Blood oxygen
Blood oxygen	Yes	Yes
Skin temperature
Skin temperature	Yes	Yes
Sleep apnoea alerts
Sleep apnoea alerts	Yes	Yes
High blood pressure alerts
High blood pressure alerts	Yes	Yes
Body composition
Body composition	No	No
Fall detection
Fall detection	Yes	Yes
Crash detection
Crash detection	Yes	Yes
GPS
GPS	Single-band	Single-band
Water resistance
Water resistance	50 m	50 m
Sensors
Sensors	Electrical heart sensor; third-generation optical heart sensor; blood oxygen sensor; temperature sensor; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope; ambient light sensor; depth gauge to 6 m; water temperature sensor	Electrical heart sensor; third-generation optical heart sensor; temperature sensing; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope; ambient light sensor
Health features
Health features	ECG app; Blood Oxygen app; hypertension notifications; sleep apnoea notifications; irregular rhythm notifications; high and low heart rate notifications; Vitals app; sleep stages and sleep score; wrist temperature; Cycle Tracking with retrospective ovulation estimates; Medications; Mindfulness with state of mind tracking; Noise	ECG app; Blood Oxygen app; sleep apnoea notifications and hypertension notifications (added in later watchOS updates); irregular rhythm notifications; high and low heart rate notifications; sleep stages; Cycle Tracking with retrospective ovulation estimates; Medications; Mindfulness; Noise
Fitness features
Fitness features	Custom workouts; Training Load; heart rate zones; Race Route; Pacer; stride length, ground contact time and vertical oscillation; automatic track detection; multisport workouts; offline maps with custom route creation; Backtrack; pool and open-water swimming with SWOLF; cycling power zones with Bluetooth accessories; GymKit	Custom interval workouts; Heart Rate Zones; Race Route; stride length, ground contact time and vertical oscillation; automatic track detection; multisport workouts; Backtrack; pool and open-water swimming with SWOLF and automatic stroke detection; cycling Functional Threshold Power, power zones and cadence with Bluetooth accessories; GymKit
Safety features
Safety features	Emergency SOS; international emergency calling; Crash Detection; Fall Detection; noise monitoring; Backtrack	Emergency SOS; international emergency calling; Crash Detection; Fall Detection
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 24 hours	Up to 18 hours
In low-power mode
In low-power mode	Up to 38 hours	Up to 36 hours
Mobile data option
Mobile data option	Yes	Yes
Works with
Works with	iPhone	iPhone
Chip
Chip	S10	S9
Storage
Storage	64 GB	64 GB
Battery life detail
Battery life detail	Up to 24 hours of normal use; up to 38 hours in Low Power Mode	Built-in rechargeable lithium-ion battery
Charging
Charging	Fast charging to 80% in about 30 minutes; 15 minutes for up to 8 hours of normal use; 5 minutes for up to 8 hours of sleep tracking	Fast charging to 80% in about 45 minutes
Connectivity
Connectivity	Wi-Fi 4 (802.11n) at 2.4GHz and 5GHz; Bluetooth 5.3; second-generation Ultra Wideband chip; NFC for Apple Pay; L1 GPS, GLONASS, Galileo, QZSS and BeiDou; GPS + Cellular models (A3335, A3337) with 5G RedCap and LTE	L1 GPS, GNSS, Galileo and BeiDou; 4G LTE and UMTS (GPS + Cellular models); Wi-Fi 4 (802.11n); Bluetooth 5.3; second-generation Ultra Wideband chip with Precision Finding for iPhone 15 and later; Apple Pay
Design
Weight (lightest version)
Weight (lightest version)	29.7 g (better)	31.9 g
Software
Software	watchOS	watchOS
Case materials
Case materials	100% recycled aluminium or 100% recycled titanium case; water resistant to 50 m (ISO 22810:2010); IP6X dust resistant	Aluminium or stainless steel case; water resistant to 50 m (swimproof); IP6X dust resistant
Size
Size	42mm is 42 x 36 x 9.7 mm; 46mm is 46 x 39 x 9.7 mm; lightest is the 42mm aluminium GPS + Cellular at 29.7 g, heaviest the 46mm titanium at 43.1 g	41mm is 41 x 35 x 10.7 mm, 31.9 g (aluminium, GPS), 32.1 g (aluminium, GPS + Cellular) or 42.3 g (stainless steel); 45mm is 45 x 38 x 10.7 mm, 38.7 g (aluminium, GPS), 39.0 g (aluminium, GPS + Cellular) or 51.5 g (stainless steel); lightest is the 41mm aluminium GPS
Bands
Bands	Fits 130–200 mm wrists (42mm) or 140–245 mm wrists (46mm)	Fits 130–200 mm wrists (41mm) or 140–245 mm wrists (45mm)
Colours
Colours	Aluminium in Jet Black, Rose Gold, Silver and Space Grey; titanium in Natural, Gold and Slate	Aluminium in Pink, Midnight, Starlight, Silver and (PRODUCT)RED; stainless steel in Gold, Silver and Graphite
In the box
In the box	Apple Watch Series 11, strap, Apple Watch Magnetic Fast Charger to USB-C Cable (1 m)	Apple Watch Series 9, strap, Apple Watch Magnetic Fast Charger to USB-C Cable (1 m)