Apple Watch Ultra 4 vs Watch Series 11 specs comparison
The Ultra 4 is the better choice for endurance training, outdoor use and battery life, with a tougher titanium build and substantially longer runtime. The Series 11 makes more sense for everyday use if you want the core Apple Watch experience in a slimmer, lighter and less expensive package.
Full comparison
The full record
79 specifications across 6 areas, with 23 genuine differences.
1. Design & display Mixed
Fact
Apple Watch Ultra 4
Apple Watch Series 11
Release date
2026-09-18
2025-09-19
Physical size
49 x 44 x 12 mm
46 x 39 x 9.7 mm; 42 x 36 x 9.7 mm
Weight
63.0 g (Natural), 63.1 g (Black)
46 mm: 37.8 g (aluminum GPS), 36.9 g (aluminum GPS + Cellular), 43.1 g (titanium); 42 mm: 30.3 g, 29.7 g, 34.6 g respectively
Material
Grade 5 titanium case
Aluminum or titanium case
Water resistance
10 ATM; IP6X; MIL-STD 810H; recreational scuba diving to 40 m
5 ATM; IP6X; depth gauge to 6 m
Color options
Natural Titanium, Black Titanium
Aluminum: Rose Gold, Silver, Space Gray, Jet Black; Titanium: Gold, Natural, Slate
Display type
Always-On Retina LTPO3 wide-angle OLED
Always-On Retina LTPO3 wide-angle OLED
Display size
49 mm case
42 mm or 46 mm case
Display resolution
422 x 514 pixels
42 mm: 374 x 446 pixels; 46 mm: 416 x 496 pixels
Display brightness
Up to 3,000 nits
Up to 2,000 nits
Display protection
Flat sapphire crystal display
Ion-X front glass with 2x better scratch resistance than Series 10 (aluminum); sapphire front crystal (titanium)
2. Battery & charging Apple Watch Ultra 4
Fact
Apple Watch Ultra 4
Apple Watch Series 11
Battery
Rechargeable lithium-ion battery
Rechargeable lithium-ion battery
Battery life
Up to 50 hours normal use; up to 84 hours in Low Power Mode; up to 18 hours outdoor workout; up to 25 hours Extended Workout; up to 45 hours Max Extended Workout
Up to 24 hours; up to 38 hours in Low Power Mode
Charging
USB-C magnetic fast charging; up to 80% in about 45 minutes
USB-C magnetic fast charging; up to 80% in about 30 minutes, 15 minute charge for 8 hours of use
3. Sensors & positioning Mixed
Fact
Apple Watch Ultra 4
Apple Watch Series 11
GNSS type
Built-in dual-band GNSS
Built-in GNSS
GPS
Yes
Yes
GALILEO
Yes
Yes
GLONASS
No
Yes
QZSS
Yes
Yes
Beidou
Yes
Yes
Accelerometer
Yes
Yes
Gyroscope
Yes
Yes
Barometric altimeter
Yes
Yes
Compass
Yes
Yes
Ambient light sensor
Yes
Yes
Optical heart rate
Yes (always-on optical heart sensor; high-frequency background tracking)
Yes
Electrical heart rate
Yes
Yes
SpO2
Yes
Yes
Temperature
Yes
Yes
Galvanic skin response
No
No
Microphone
Yes
Yes
Speakers
Yes
Yes
Vibration motor
Yes
Yes
4. Health & activity No clear edge
Fact
Apple Watch Ultra 4
Apple Watch Series 11
Steps
Yes
Yes
Distance
Yes
Yes
Calories burned
Yes
Yes
Floors
Yes
Yes
Sports tracking
Yes
Yes
Sleep
Yes
Yes
Heart rate
Yes
Yes
HRV
Yes (Up to 24x more frequent than Ultra 3)
Yes
Stress
No
No
Blood oxygen
Yes
Yes
Respiration rate
Yes
Yes
Skin temperature
Yes
Yes
ECG
Yes
Yes
Blood pressure
Hypertension notifications (no direct blood-pressure measurement)
Hypertension notifications (no direct blood-pressure measurement)
Body composition
No
No
Glucose
No
No
Hydration level
No
No
UV exposure
No
No
Calorie intake
No
No
Hyperglycemia risk assessment
No
No
Arterial stiffness detection
No
No
Pulse wave arrhythmia analysis
Yes
Yes
Readiness
Yes
No
5. Smart features No clear edge
Fact
Apple Watch Ultra 4
Apple Watch Series 11
Smartphone compatibility
iPhone 11 or later or iPhone SE (2nd generation or later) with iOS 27 or later
iPhone 11 or later with iOS 26 or later
Operating system at launch
watchOS 27
watchOS 26
Processor
Apple S11, 64-bit dual-core processor; 4-core Neural Engine; Audio Intelligence
Apple S10, 64-bit dual-core; 4-core Neural Engine
RAM
4 GB
2 GB
Storage
64 GB
64 GB
Bluetooth
Yes (5.3)
Yes (5.3)
Wi-Fi
Yes (Wi-Fi 4 / 802.11n, 2.4/5 GHz)
Yes (Wi-Fi 4 / 802.11n, 2.4/5 GHz)
NFC / connected pay
Yes (Apple Pay)
Yes (Apple Pay)
UWB
Yes (2nd-generation UWB)
Yes (2nd-generation UWB)
Cellular
Yes (5G RedCap and LTE on supported regional models)
Optional (5G RedCap and LTE on supported regional models)
Smartphone notifications
Yes
Yes
Bluetooth calling
Yes (standalone on cellular models; via paired iPhone otherwise)
Yes (standalone on cellular models; via paired iPhone otherwise)
Smartphone music control
Yes
Yes
On-board music storage
Yes
Yes
Voice assistant
Siri AI powered by Apple Intelligence
Siri
6. Navigation & safety Apple Watch Ultra 4
Fact
Apple Watch Ultra 4
Apple Watch Series 11
Maps
Yes
Yes
Offline maps
Yes
Yes
Navigation
Yes
Yes
Emergency SOS
Yes
Yes
Satellite SOS
Yes
No
Fall detection
Yes
Yes
LED flashlight
No
No
Diving
Yes
No