Samsung Galaxy Watch Ultra 2 vs Apple Watch Ultra 3
This one mostly comes down to your phone. Apple Watch Ultra 3 is the better fit for iPhone users and has the stronger smartwatch ecosystem, while Galaxy Watch Ultra 2 makes more sense on Android and offers much longer quoted battery life. Both cover serious fitness and outdoor use well, so ecosystem is likely to make the decision for most people.
At a glance
What's different?
The strongest database-backed differences, without pretending every different number is an advantage.
Samsung Galaxy Watch Ultra 2
- Phone compatibility Android with Google Mobile Services
- 90% longer battery life 80 hours vs 42 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
Apple Watch Ultra 3
- Phone compatibility iPhone 11 or later with iOS 26 or later
- Satellite SOS Not available on the other model
- UWB 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
78 specifications across 6 areas, with 32 genuine differences.
1. Design & display Samsung Galaxy Watch Ultra 2
Fact
Samsung Galaxy Watch Ultra 2
Apple Watch Ultra 3
Release date
2026-07
2025-09-19
Physical size
47.4 x 47.1 x 10.7 mm
49 x 44 x 12 mm
Weight
61.5 g
61.6 g (Natural), 61.8 g (Black)
Material
Titanium case; sapphire crystal
Grade 5 titanium case
Water resistance
10 ATM; IP69K; MIL-STD-810H; EN13319
10 ATM; IP6X; MIL-STD 810H; recreational scuba diving to 40 m
Color options
Titanium Gray, Titanium Silver
Natural Titanium, Black Titanium
Display type
Super AMOLED, full-colour Always On Display
Always-On Retina LTPO3 wide-angle OLED
Display size
1.5 inch (38.5 mm)
49 mm case
Display resolution
498 x 498 pixels
422 x 514 pixels
Display brightness
Up to 5,000 nits
Up to 3,000 nits
Display protection
Sapphire crystal
Flat sapphire crystal display
2. Battery & charging Samsung Galaxy Watch Ultra 2
Fact
Samsung Galaxy Watch Ultra 2
Apple Watch Ultra 3
Battery
Rechargeable battery; 800 mAh
Rechargeable lithium-ion battery
Battery life
Up to 80 hours with AOD off; up to 60 hours with AOD on
Up to 42 hours; up to 72 hours in Low Power Mode
Charging
Fast wireless charging
USB-C magnetic fast charging; up to 80% in about 45 minutes
3. Sensors & positioning No clear edge
Fact
Samsung Galaxy Watch Ultra 2
Apple Watch Ultra 3
GNSS type
Built-in dual-band GNSS
Built-in dual-band GNSS
GPS
Yes
Yes
GALILEO
Yes
Yes
GLONASS
Yes
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
Yes
Electrical heart rate
Yes
Yes
SpO2
Yes
Yes
Temperature
Yes
Yes
Galvanic skin response
Yes
No
Microphone
Yes
Yes
Speakers
Yes
Yes
Vibration motor
Yes
Yes
4. Health & activity Samsung Galaxy Watch Ultra 2
Fact
Samsung Galaxy Watch Ultra 2
Apple Watch Ultra 3
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
Yes
Stress
Yes
No
Blood oxygen
Yes
Yes
Respiration rate
Yes
Yes
Skin temperature
Yes
Yes
ECG
Yes
Yes
Blood pressure
Yes (Samsung Health Monitor; availability varies by market, calibration required)
Hypertension notifications (no direct blood-pressure measurement)
Body composition
Yes
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
5. Smart features No clear edge
Fact
Samsung Galaxy Watch Ultra 2
Apple Watch Ultra 3
Smartphone compatibility
Android with Google Mobile Services
iPhone 11 or later with iOS 26 or later
Operating system at launch
Wear OS 7 Powered by Samsung; One UI 9 Watch
watchOS 26
Processor
Qualcomm Snapdragon Wear Elite / SDW6100 (3 nm, penta-core)
Apple S10, 64-bit dual-core; 4-core Neural Engine
RAM
2 GB
2 GB
Storage
64 GB
64 GB
Bluetooth
Yes (6.0)
Yes (5.3)
Wi-Fi
Yes (802.11 a/b/g/n, 2.4/5 GHz)
Yes (Wi-Fi 4 / 802.11n, 2.4/5 GHz)
NFC / connected pay
Yes
Yes (Apple Pay)
UWB
No
Yes (2nd-generation UWB)
Cellular
Yes (LTE/eSIM)
Yes (5G RedCap and LTE on supported regional models)
Smartphone notifications
Yes
Yes
Bluetooth calling
Yes
Yes (standalone on cellular models; via paired iPhone otherwise)
Smartphone music control
Yes
Yes
On-board music storage
Yes
Yes
Voice assistant
Google Gemini / Bixby
Siri
6. Navigation & safety Apple Watch Ultra 3
Fact
Samsung Galaxy Watch Ultra 2
Apple Watch Ultra 3
Maps
Yes (Google Maps)
Yes
Offline maps
Yes (Google Maps)
Yes
Navigation
Yes (turn-by-turn navigation)
Yes
Emergency SOS
Yes
Yes
Satellite SOS
No
Yes
Fall detection
Yes
Yes
LED flashlight
No
No
Diving
Yes (EN13319; depth and dive metrics to 40 m)
Yes