Huawei Watch D3 vs Samsung Galaxy Watch 9 specs comparison
The Watch D3 is the better pick for serious health monitoring, particularly its cuff-based blood pressure measurements. The Galaxy Watch 9 is the stronger smartwatch overall, with Wear OS, more apps, LTE options, better fitness features and a slimmer design.
At a glance
What's different?
The strongest database-backed differences, without pretending every different number is an advantage.
Huawei Watch D3
- 260% longer battery life 6 days vs 40 hours
- Different material configuration Aluminum alloy case
- 31% larger display 1.92 in vs 1.47 in
- 100% more storage 64 GB vs 32 GB
Samsung Galaxy Watch 9
- Multi-band GPS Built-in dual-band GNSS vs Built-in GNSS
- Offline maps Not available on the other model
- Built-in maps Not available on the other model
- Body composition Not available on the other model
- 15% lighter 34.0 g vs 40 g
- Emergency SOS Not available on the other model
- Fall detection Not available on the other model
Both include ECG, blood oxygen tracking, skin temperature tracking, HRV tracking, Bluetooth calling, a microphone, a speaker.
Full comparison
The full record
74 specifications across 6 areas, with 29 genuine differences.
1. Design & display Mixed
Fact
Huawei Watch D3
Samsung Galaxy Watch 9
Release date
2026-09-02
2026-07
Physical size
46.5 x 41 x 11.3 mm
44 mm: 46.0 x 43.7 x 8.6 mm; 40 mm: 42.7 x 40.4 x 8.6 mm
Weight
40 g without strap
44 mm: 34.0 g; 40 mm: 31.5 g
Material
Aluminum alloy case
Armor Aluminum case; sapphire crystal
Water resistance
IP68; not designed for swimming, snorkeling or diving
5 ATM; IP68; MIL-STD-810H
Color options
Mocha Gold, Pale Gold, Black
Graphite, Silver, Cream
Display type
AMOLED
Super AMOLED, full-colour Always On Display
Display size
1.92 inch
44 mm: 1.47 inch (37.3 mm); 40 mm: 1.34 inch (34 mm)
Display resolution
408 x 480 pixels, 328 ppi
44 mm: 480 x 480 pixels; 40 mm: 438 x 438 pixels
Display brightness
Up to 3,000 nits
Up to 3,000 nits
2. Battery & charging Huawei Watch D3
Fact
Huawei Watch D3
Samsung Galaxy Watch 9
Battery
540 mAh rechargeable battery
Rechargeable battery; 44 mm: 445 mAh; 40 mm: 390 mAh
Battery life
Up to 6 days typical use; up to 1 day with ABPM enabled
Up to 40 hours with AOD off; up to 30 hours with AOD on
Charging
Wireless charging
Fast wireless charging
3. Sensors & positioning Samsung Galaxy Watch 9
Fact
Huawei Watch D3
Samsung Galaxy Watch 9
GNSS type
Built-in 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
Geomagnetic
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
No
Yes
Microphone
Yes
Yes
Speakers
Yes
Yes
Vibration motor
Yes
Yes
4. Health & activity Mixed
Fact
Huawei Watch D3
Samsung Galaxy Watch 9
Steps
Yes
Yes
Distance
Yes
Yes
Calories burned
Yes
Yes
Floors
Yes
Yes
Sports tracking
Yes (100+ workout modes)
Yes
Sleep
Yes
Yes
Heart rate
Yes
Yes
HRV
Yes
Yes
Stress
Yes
Yes
Blood oxygen
Yes
Yes
Respiration rate
Yes
Yes
Skin temperature
Yes
Yes
ECG
Yes
Yes
Blood pressure
Yes
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
Yes
No
Arterial stiffness detection
Yes
No
Pulse wave arrhythmia analysis
Yes
Yes
5. Smart features Mixed
Fact
Huawei Watch D3
Samsung Galaxy Watch 9
Smartphone compatibility
Android 8.0+ and iOS 13.0+
Android with Google Mobile Services
Operating system at launch
HarmonyOS
Wear OS 7 Powered by Samsung; One UI 9 Watch
Storage
64 GB
32 GB
Bluetooth
Yes (6.0)
Yes (6.0)
Wi-Fi
No
Yes (802.11 a/b/g/n, 2.4/5 GHz)
NFC / connected pay
Yes
Yes
UWB
No
No
Cellular
No
Optional LTE/eSIM
Smartphone notifications
Yes
Yes
Bluetooth calling
Yes
Yes
Smartphone music control
Yes
Yes
On-board music storage
No
Yes
Voice assistant
Yes
Google Gemini / Bixby
6. Navigation & safety Samsung Galaxy Watch 9
Fact
Huawei Watch D3
Samsung Galaxy Watch 9
Maps
No
Yes (Google Maps)
Offline maps
No
Yes (Google Maps)
Navigation
Yes
Yes (turn-by-turn navigation)
Emergency SOS
No
Yes
Satellite SOS
No
No
Fall detection
No
Yes
LED flashlight
No
No