Apple Watch Ultra 3
Quick details
Released
September 2025
Dimensions
49 x 44 x 12 mm
Operating system
watchOS
Display 49 mm case Always-On Retina LTPO3 wide-angle OLED
Battery life Up to 42 hours; up to 72 hours in Low Power Mode
Water resistance 10 ATM; IP6X; MIL-STD 810H; recreational scuba diving to 40 m
GPS Yes
Sensors Electrical and optical heart sensors, Blood Oxygen, temperature, compass, altimeter, accelerometer, gyroscope, ambient light, depth and water temperature
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Technical specifications
General
Release date 2025-09-19
Product type Smartwatch
Physical size 49 x 44 x 12 mm
Weight 61.6 g (Natural), 61.8 g (Black)
Material Grade 5 titanium case
Water resistance 10 ATM; IP6X; MIL-STD 810H; recreational scuba diving to 40 m
Color options Natural Titanium, Black Titanium
Display type Always-On Retina LTPO3 wide-angle OLED
Display size 49 mm case
Display resolution 422 x 514 pixels
Display brightness Up to 3,000 nits
Display protection Flat sapphire crystal display
Battery Built-in rechargeable lithium-ion battery
Battery life Up to 42 hours; up to 72 hours in Low Power Mode
Charging USB-C magnetic fast charging; up to 80% in about 45 minutes
Sensors
GNSS type Built-in dual-band GNSS
GPS Yes
GALILEO Yes
GLONASS Yes
QZSS Yes
Beidou Yes
Accelerometer Yes
Gyroscope Yes
Barometric altimeter Yes
Compass Yes
Ambient light sensor Yes
Optical heart rate Yes
Electrical heart rate Yes
SpO2 Yes
Temperature Yes
Galvanic skin response No
Microphone Yes
Speakers Yes
Vibration motor Yes
Health & activity tracking
Steps Yes
Distance Yes
Calories burned Yes
Floors Yes
Sports tracking Yes
Sleep Yes
Heart rate Yes
HRV Yes
Stress No
Blood oxygen Yes
Respiration rate Yes
Skin temperature Yes
ECG Yes
Blood pressure Hypertension notifications (no direct blood-pressure measurement)
Body composition No
Glucose No
Hydration level No
UV exposure No
Calorie intake No
Hyperglycemia risk assessment No
Arterial stiffness detection No
Pulse wave arrhythmia analysis Yes
Daily smart features
Smartphone compatibility iPhone 11 or later with iOS 26 or later
Operating system at launch watchOS
Processor Apple S10, 64-bit dual-core; 4-core Neural Engine
Storage 64 GB
Bluetooth Yes (5.3)
Wi-Fi Yes (Wi-Fi 4 / 802.11n, 2.4/5 GHz)
NFC / connected pay Yes (Apple Pay)
UWB Yes (2nd-generation UWB)
Cellular Yes (5G RedCap and LTE on supported regional models)
Smartphone notifications Yes
Bluetooth calling Yes (standalone on cellular models; via paired iPhone otherwise)
Smartphone music control Yes
On-board music storage Yes
Voice assistant Siri
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These technical specs are correct to the best of our knowledge at the time of publishing.
