Apple Watch Ultra 4 vs Apple Watch Ultra 3 comparison

Show Only Differences Highlight Differences	Apple Watch Ultra 4	Apple Watch Ultra 3
key specs
Display Size	49mm	49mm
Dial Shape	Rectangle	Square
Display Type	OLED Retina	OLED Retina
Ideal For	Unisex	Unisex
Compatible OS	-	iOS 26
general
Brand	Apple	Apple
Model	Watch Ultra 4	Watch Ultra 3
Release date	September 9, 2026	September 9, 2025
Dial Shape	Rectangle	Square
Usage	Regular, Sports	-
Ideal For	Unisex	Unisex
Model Name	-	Watch Ultra 3
Dial Colour	-	Natural, Black
Size	-	Large
Touchscreen	-	Yes
Interchangeable Strap	-	Yes
Water Resistant	-	WR100
Water Resistance Depth	-	100
Dial Material	-	Titanium
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	-
Battery Type	Rechargeable lithium-ion	-
Battery Life	up to 50 hours	Up to 24 hours
Charger Type	Magnetic charging port	Wireless
Rechargeable Battery	Yes	-
Compatible Device	-	iPhone 11 and above
connectivity features
Call Function	Yes	Yes
Bluetooth	Yes	Yes
Wi-Fi	Yes	Yes
GPS	Yes	Yes
Bluetooth Version	-	5.3
Messaging Support	-	Yes
Other Connectivity Features	-	Satellite Emergency SoS
platform and storage features
Operating System	watchOS 27	watchOS 26
Processor Name	Apple S11 chip	Apple S11
Internal Memory	64GB	64GB
Compatible Operating System	-	iOS 26
camera and display features
Display Resolution	422 × 514	-
Display Size	49mm	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	Always-On Display
fitness and watch functions
Step Count	Yes	Yes
Calorie Count	Yes	Yes
Heart Rate Monitor	Yes	Yes
Altimeter	Yes	-
Compass	Yes	Yes
Calendar	Yes	Yes
Alarm Clock	Yes	Yes
Chronograph	Yes	-
Date & Time Display	Yes	Yes
Language	English	-
Number of Buttons	3	3
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	-
audio and video features
Speaker	Yes	Yes
Gesture Control	Yes	Yes
Microphone	Yes	Yes
Voice Control	Siri AI	Yes
dimensions
Width	-	44
Height	-	49
Thickness	-	12
Weight (g)	-	61.60

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