Samsung Galaxy Watch8 vs Samsung Galaxy Watch9

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Galaxy Watch8 compared with Galaxy Watch9

	SamsungGalaxy Watch8	SamsungGalaxy Watch9
Overview
Released
Released	July 2025	August 2026
Display
Case sizes
Case sizes	40 mm or 44 mm	40 mm or 44 mm
Panel
Panel	OLED	OLED
Peak brightness
Peak brightness	3,000 nits	3,000 nits
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	Super AMOLED with full-colour Always On Display; 40 mm has 1.34 inches (34 mm) with 438 x 438 pixels; 44 mm has 1.47 inches (37.3 mm) with 480 x 480 pixels; 16M colours	Super AMOLED with full-colour Always On Display; 40mm is 1.34-inch (34 mm) with 438 x 438 pixels, 44mm is 1.47-inch (37.3 mm) with 480 x 480 pixels; 16M colours
Screen protection
Screen protection	Sapphire Crystal	Sapphire Crystal
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	No	No
Body composition
Body composition	Yes	Yes
Fall detection
Fall detection	Yes	Yes
Crash detection
Crash detection	No	No
GPS
GPS	Dual-band (L1 and L5)	Dual-band (L1 and L5)
Water resistance
Water resistance	50 m	50 m
Sensors
Sensors	Samsung BioActive Sensor (optical bio-signal sensor, electrical heart signal sensor and bioelectrical impedance analysis sensor); infrared temperature sensor; accelerometer; barometer; gyro sensor; geomagnetic sensor; light sensor	Samsung BioActive Sensor (optical bio-signal sensor, electrical heart signal sensor and bioelectrical impedance analysis sensor); temperature sensor; accelerometer; barometer; gyro sensor; geomagnetic sensor; light sensor
Health features
Health features	ECG with Irregular Heart Rhythm Notification, blood pressure (calibrated against an arm cuff every 4 weeks) and CE-marked sleep apnoea detection in the Samsung Health Monitor app, which needs a Galaxy phone; Antioxidant Index; Energy Score; Bedtime Guidance and Sleep Coaching; Vascular Load; body composition; stress tracking and guided meditation; Cycle Tracking	ECG with Irregular Heart Rhythm Notification, blood pressure (calibrated against an arm cuff every 4 weeks) and sleep apnoea detection in the Samsung Health Monitor app, which needs a Galaxy phone; Vitals (heart rate, heart rate variability, respiratory rate, skin temperature and blood oxygen during sleep, against a personal baseline); Heart Health Score; Vascular Load; Antioxidant Index; AGEs Index; Energy Score; sleep tracking, Sleep Coaching and Bedtime Guidance; body composition; High Stress Alert; Cycle Tracking; Hearing, with alerts for unsafe noise levels
Fitness features
Fitness features	Running Coach; automatic workout detection	Running Coach; Fitness Index; Daily Cardio Load; Personalised Heart Rate Zone; Personalised Functional Threshold Power; Strava and iFIT apps
Safety features
Safety features	Emergency SOS; Fall Detection	Emergency SOS; Fall Detection
Battery and connections
Battery life (maker's claim)
Battery life (maker's claim)	Up to 30 hours	Up to 30 hours
Mobile data option
Mobile data option	Yes	Yes
Works with
Works with	Android	Android
Chip
Chip	Exynos W1000	Snapdragon Wear Elite
Storage
Storage	32 GB	32 GB
Battery life detail
Battery life detail	Up to 30 hours with Always On Display on and up to 40 hours with it off; 325 mAh (40 mm) and 435 mAh (44 mm) typical capacity	Up to 30 hours with Always On Display on and up to 40 hours with it off (Samsung's typical-use tests); 390 mAh (40mm) or 445 mAh (44mm) typical capacity
Charging
Charging	Fast Charging (WPC-based wireless charging); wireless charger in the box	Fast Charging (WPC-based wireless charging); Wireless Charger in the box
Connectivity
Connectivity	LTE models with eSIM (4G LTE and 3G); Bluetooth 5.3; Wi-Fi 802.11a/b/g/n at 2.4 GHz and 5 GHz; NFC; L1 + L5 dual-frequency GPS with Glonass, Beidou and Galileo; pairs with Android 12 or later phones with more than 1.5 GB of memory	LTE models with eSIM (4G LTE and 3G); Bluetooth 6.0; Wi-Fi 802.11a/b/g/n at 2.4 GHz and 5 GHz; NFC; L1 + L5 dual-frequency GPS with Glonass, Beidou, Galileo and QZSS; pairs with Android 13 or later phones with more than 1.5 GB of memory
Storage
Storage	2 GB memory; 32 GB storage (20.2 GB available on the 44 mm Bluetooth model)	2 GB memory; 32 GB storage (20.1 GB available)
Design
Weight (lightest version)
Weight (lightest version)	30 g (better)	31.5 g
Software
Software	Wear OS	Wear OS
Case materials
Case materials	Armor Aluminium case; Sapphire Crystal; 5ATM and IP68; MIL-STD-810H	Aluminium case; Sapphire Crystal; 5ATM (50 m, ISO 22810, fresh water) and IP68 (IPX8 to 1.5 m for 30 minutes; IP6X dust); MIL-STD-810H
Size
Size	40 mm is 42.7 x 40.4 x 8.6 mm and 30.0 g; 44 mm is 46.0 x 43.7 x 8.6 mm and 34.0 g (watch body without band)	40mm is 42.7 x 40.4 x 8.6 mm and 31.5 g; 44mm is 46.0 x 43.7 x 8.6 mm and 34.0 g; weights are for the watch body without band, lightest is the 40mm
Bands
Bands	Dynamic Lug System; Sport, Fabric, Hybrid and Athleisure bands	Sport Band in the box, fitted with the Dynamic Lug System; Misty Band and Fabric Band sold separately
Colours
Colours	Graphite, Silver	40mm in Cream and Graphite; 44mm in Graphite and Silver
In the box
In the box	–	Galaxy Watch9, Sport Band, Wireless Charger