Apple Watch Ultra 4 vs Samsung Galaxy Watch Ultra 2
This mostly comes down to your phone, Ultra 4 for iPhone and Galaxy Watch Ultra for Android. Apple gives you the tighter health and fitness ecosystem plus up to 50 hours of normal use, while Samsung offers body composition, blood pressure support in eligible markets and longer quoted battery life, with up to 60 hours with AOD or 80 hours without it.
At a glance
What's different?
The strongest database-backed differences, without pretending every different number is an advantage.
Apple Watch Ultra 4
- Phone compatibility iPhone 11 or later or iPhone SE (2nd generation or later) with iOS 27 or later
- Satellite SOS Not available on the other model
- UWB Not available on the other model
Samsung Galaxy Watch Ultra 2
- Phone compatibility Android with Google Mobile Services
- 60% longer battery life 80 hours vs 50 hours
- Blood pressure measurement Yes (Samsung Health Monitor; availability varies by market, calibration required)
- 67% brighter display Up to 5,000 nits vs Up to 3,000 nits
- Body composition Not available on the other model
Both include ECG, blood oxygen tracking, skin temperature tracking, HRV tracking, on-board music, Bluetooth calling, a microphone.
Full comparison
The full record
77 specifications across 6 areas, with 33 genuine differences.
1. Design & display Samsung Galaxy Watch Ultra 2
Fact
Apple Watch Ultra 4
Samsung Galaxy Watch Ultra 2
Release date
2026-09-18
2026-07
Physical size
49 x 44 x 12 mm
47.4 x 47.1 x 10.7 mm
Weight
63.0 g (Natural), 63.1 g (Black)
61.5 g
Material
Grade 5 titanium case
Titanium case; sapphire crystal
Water resistance
10 ATM; IP6X; MIL-STD 810H; recreational scuba diving to 40 m
10 ATM; IP69K; MIL-STD-810H; EN13319
Color options
Natural Titanium, Black Titanium
Titanium Gray, Titanium Silver
Display type
Always-On Retina LTPO3 wide-angle OLED
Super AMOLED, full-colour Always On Display
Display size
49 mm case
1.5 inch (38.5 mm)
Display resolution
422 x 514 pixels
498 x 498 pixels
Display brightness
Up to 3,000 nits
Up to 5,000 nits
Display protection
Flat sapphire crystal display
Sapphire crystal
2. Battery & charging Samsung Galaxy Watch Ultra 2
Fact
Apple Watch Ultra 4
Samsung Galaxy Watch Ultra 2
Battery
Rechargeable lithium-ion battery
Rechargeable battery; 800 mAh
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 80 hours with AOD off; up to 60 hours with AOD on
Charging
USB-C magnetic fast charging; up to 80% in about 45 minutes
Fast wireless charging
3. Sensors & positioning Samsung Galaxy Watch Ultra 2
Fact
Apple Watch Ultra 4
Samsung Galaxy Watch Ultra 2
GNSS type
Built-in dual-band GNSS
Built-in dual-band 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
Yes
Microphone
Yes
Yes
Speakers
Yes
Yes
Vibration motor
Yes
Yes
4. Health & activity Samsung Galaxy Watch Ultra 2
Fact
Apple Watch Ultra 4
Samsung Galaxy Watch Ultra 2
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
Yes
Blood oxygen
Yes
Yes
Respiration rate
Yes
Yes
Skin temperature
Yes
Yes
ECG
Yes
Yes
Blood pressure
Hypertension notifications (no direct blood-pressure measurement)
Yes (Samsung Health Monitor; availability varies by market, calibration required)
Body composition
No
Yes
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
5. Smart features No clear edge
Fact
Apple Watch Ultra 4
Samsung Galaxy Watch Ultra 2
Smartphone compatibility
iPhone 11 or later or iPhone SE (2nd generation or later) with iOS 27 or later
Android with Google Mobile Services
Operating system at launch
watchOS 27
Wear OS 7 Powered by Samsung; One UI 9 Watch
Processor
Apple S11, 64-bit dual-core processor; 4-core Neural Engine; Audio Intelligence
Qualcomm Snapdragon Wear Elite / SDW6100 (3 nm, penta-core)
Storage
64 GB
64 GB
Bluetooth
Yes (5.3)
Yes (6.0)
Wi-Fi
Yes (Wi-Fi 4 / 802.11n, 2.4/5 GHz)
Yes (802.11 a/b/g/n, 2.4/5 GHz)
NFC / connected pay
Yes (Apple Pay)
Yes
UWB
Yes (2nd-generation UWB)
No
Cellular
Yes (5G RedCap and LTE on supported regional models)
Yes (LTE/eSIM)
Smartphone notifications
Yes
Yes
Bluetooth calling
Yes (standalone on cellular models; via paired iPhone otherwise)
Yes
Smartphone music control
Yes
Yes
On-board music storage
Yes
Yes
Voice assistant
Siri AI powered by Apple Intelligence
Google Gemini / Bixby
6. Navigation & safety Apple Watch Ultra 4
Fact
Apple Watch Ultra 4
Samsung Galaxy Watch Ultra 2
Maps
Yes
Yes (Google Maps)
Offline maps
Yes
Yes (Google Maps)
Navigation
Yes
Yes (turn-by-turn navigation)
Emergency SOS
Yes
Yes
Satellite SOS
Yes
No
Fall detection
Yes
Yes
LED flashlight
No
No
Diving
Yes
Yes (EN13319; depth and dive metrics to 40 m)