Oppo Watch S2 vs Huawei Watch GT 7 specs comparison
The Watch S2 is the lighter, slimmer option and has some distinctive fitness tools, particularly FatMax. The Watch GT 7 offers a more premium build, sapphire display protection and much longer battery life, while still providing dual-band GNSS and a broad health and sports package.
Full comparison
The full record
77 specifications across 6 areas, with 30 genuine differences.
1. Design & display Huawei Watch GT 7
Fact
Oppo Watch S2
Huawei Watch GT 7
Release date
2026-09-22
2026-08-05
Physical size
8.9 mm thick
46 x 46 x 10.95 mm (46 mm); 41.3 x 41.3 x 9.99 mm (41 mm)
Weight
34.4 g without strap
51.3 g (46 mm); 36.5 g Blue / 37.5 g Pink and Grey / 37.6 g White (41 mm), without strap
Material
Stainless steel middle frame; PA + glass-fibre reinforced rear shell
Stainless-steel front case with high-performance fiber-reinforced composite rear
Water resistance
5 ATM
5 ATM + IP69
Color options
Mountain Shadow Grey, Vibrant Orange, Misty Powder
46 mm: Blue, Yellow, Black, Grey; 41 mm: Blue, Pink, White, Green, Grey
Display type
AMOLED
AMOLED
Display size
1.46 inch
1.47 inch (46 mm); 1.32 inch (41 mm)
Display resolution
464 x 464 pixels, 317 ppi
466 x 466 pixels (317 ppi 46 mm; 352 ppi 41 mm)
Display brightness
600 nits typical; 1,500 nits outdoors; up to 3,000 nits in supported workout modes
Up to 3,000 nits
Display protection
Glass
Sapphire glass
2. Battery & charging Huawei Watch GT 7
Fact
Oppo Watch S2
Huawei Watch GT 7
Battery
Rechargeable battery; 339 mAh typical; 330 mAh rated
867 mAh (46 mm); 540 mAh (41 mm) rechargeable lithium-polymer battery
Battery life
Up to 10 days in long-battery mode; up to 7 days with typical use; up to 4 days with AOD
46 mm: up to 21 days light usage, 12 days typical usage, 7 days with AOD; 41 mm: up to 14 days light usage, 7 days typical usage, 5 days with AOD; trail running mode up to 51 hours (46 mm) or 32 hours (41 mm)
Charging
Integrated magnetic watch charging cable
Wireless charging
Charging time
90 minutes
Approx. 90 minutes (46 mm); approx. 80 minutes (41 mm) in independent testing
3. Sensors & positioning No clear edge
Fact
Oppo Watch S2
Huawei Watch GT 7
GNSS type
Built-in dual-band L1+L5 GNSS
Dual-band GNSS: GPS L1+L5, GLONASS, BeiDou B1I+B1C+B2a, Galileo E1+E5a, QZSS L1+L5, NavIC
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 (upgraded optical sensor; 75% better interference resistance claimed)
Yes
Electrical heart rate
Yes (China model)
No
SpO2
Yes
Yes
Temperature
Yes
Yes
Galvanic skin response
No
No
Microphone
Yes
Yes
Speakers
Yes
Yes
Vibration motor
Yes
Yes
4. Health & activity Huawei Watch GT 7
Fact
Oppo Watch S2
Huawei Watch GT 7
Steps
Yes
Yes
Distance
Yes
Yes
Calories burned
Yes (includes FatMax estimated fat burned in grams)
Yes
Floors
Yes
Yes
Sports tracking
Yes (100+ sports modes; FatMax on 16+ activities; 65+ strength exercises recognised)
Yes; native running power, vertical oscillation and left-right ground contact balance; cycling climb planning, elevation profiles and sharp-turn warnings
Sleep
Yes (includes sleep apnoea risk assessment on China model)
Yes (TruSleep 5.0)
Heart rate
Yes
Yes
HRV
Yes (used in AI workout-readiness analysis)
Yes
Stress
Yes
Yes
Blood oxygen
Yes
Yes
Respiration rate
Yes
Yes
Skin temperature
Yes
Yes
ECG
Yes (China model)
No
Blood pressure
No
No
Body composition
No
No
Glucose
No
No (high blood sugar risk assessment is not direct glucose measurement)
Hydration level
No
No
UV exposure
No
No
Calorie intake
No
Yes
Hyperglycemia risk assessment
No
Yes (risk assessment only; not direct glucose measurement)
Arterial stiffness detection
No
No
Pulse wave arrhythmia analysis
No
Yes
5. Smart features No clear edge
Fact
Oppo Watch S2
Huawei Watch GT 7
Smartphone compatibility
Android and iOS (China model; Android + Android and Android + iPhone dual-phone combinations supported)
Android 9.0+ and iOS 13.0+
Operating system at launch
ColorOS Watch 17.0.0
HarmonyOS
Bluetooth
Yes
Yes (6.0)
Wi-Fi
No
Yes (802.11 b/g/n / Wi-Fi 4)
NFC / connected pay
Yes (unencrypted access cards; regional support varies)
Yes
UWB
No
No
Cellular
No
No
Smartphone notifications
Yes (supports dual-phone pairing)
Yes
Bluetooth calling
Yes
Yes
Smartphone music control
Yes
Yes
On-board music storage
Yes
Yes
Voice assistant
Xiaobu Assistant (China)
Yes
6. Navigation & safety Huawei Watch GT 7
Fact
Oppo Watch S2
Huawei Watch GT 7
Maps
Yes
Yes
Offline maps
No
Yes
Navigation
Yes (phone-linked navigation information via Fluid Cloud)
Yes
Emergency SOS
No
Yes
Satellite SOS
No
No
Fall detection
Yes
Yes
LED flashlight
No
No
Diving
No
No