Apple Watch Ultra 4 vs Apple Watch Series 9 GPS comparison

Show Only Differences Highlight Differences	Apple Watch Ultra 4	Apple Watch Series 9 GPS
key specs
Display Size	49mm	-
Dial Shape	Rectangle	Rectangle
Display Type	OLED Retina	OLED Retina
Ideal For	Unisex	Unisex
Strap Material	-	Silicone
general
Brand	Apple	Apple
Model	Watch Ultra 4	Watch Series 9 GPS
Release date	September 9, 2026	September 12, 2023
Dial Shape	Rectangle	Rectangle
Usage	Regular, Sports	Fitness & Outdoor
Ideal For	Unisex	Unisex
Model Name	-	Watch Series 9 GPS
Strap Material	-	Silicone
Size	-	Regular
Touchscreen	-	Yes
Interchangeable Strap	-	Yes
Water Resistant	-	Yes
Water Resistance Depth	-	5ATM
product details
Sensor	Health Sensing System, optical and electrical heart sensors, blood oxygen sensor, temperature sensor, depth gauge, water temperature sensor, compass, always-on altimeter, high-g accelerometer, gyroscope, ambient light sensor	Compass, Always-On Altimeter, optical heart rate sensor, Accelerometer, Gyroscope and Ambient light sensor
Battery Type	Rechargeable lithium-ion	-
Battery Life	up to 50 hours	18 hours
Charger Type	Magnetic charging port	-
Rechargeable Battery	Yes	Yes
Compatible Device	-	iOS
Notification	-	Yes
connectivity features
Call Function	Yes	Yes
Bluetooth	Yes	Yes
Wi-Fi	Yes	Yes
GPS	Yes	Yes
Messaging Support	-	Yes
Email Support	-	Yes
Call Features	-	International Emergency Calling
Other Connectivity Features	-	Emergency SOS
platform and storage features
Operating System	watchOS 27	watchOS
Processor Name	Apple S11 chip	S9
Internal Memory	64GB	64GB
Number of Cores	-	dual-core
camera and display features
Display Resolution	422 × 514	-
Display Size	49mm	-
Display Type	OLED Retina	OLED Retina
Scratch Resistant	Sapphire crystal	-
Other Display Features	3000 nits peak brightness, 1 nit minimum brightness, 1Hz refresh rate, 326ppi, Night Mode	LTPO OLED Always-On Retina display, up to 2000 nits of peak brightness
Backlight Display	-	Yes
fitness and watch functions
Step Count	Yes	Yes
Calorie Count	Yes	Yes
Heart Rate Monitor	Yes	Yes
Altimeter	Yes	Yes
Compass	Yes	Yes
Calendar	Yes	Yes
Alarm Clock	Yes	Yes
Chronograph	Yes	-
Date & Time Display	Yes	Yes
Language	English	English
Number of Buttons	3	2
Other Fitness Features	Readiness score, HRV, heart rate zones, Training Load, Workout Effort, VO2 max, custom workouts, race route, Pacer, cadence, stride length, running power, multisport workouts, cycling metrics, swimming metrics, diving, depth gauge, water temperature, GPS, elevation tracking, Backtrack and offline maps	Blood Oxgen Sensor, ECG sensor
audio and video features
Speaker	Yes	Yes
Gesture Control	Yes	Yes
Microphone	Yes	Yes
Voice Control	Siri AI	Yes

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