Oppo Watch S2 vs Amazfit Balance 3 specs comparison
The Watch S2 has the edge for a slimmer design and features such as ECG and FatMax. Amazfit Balance 3 is the stronger endurance option, with up to 21 days of typical battery life and considerably longer GPS runtime, while still covering the core health and training features most people need.
Full comparison
The full record
76 specifications across 6 areas, with 32 genuine differences.
1. Design & display Amazfit Balance 3
Fact
Oppo Watch S2
Amazfit Balance 3
Release date
2026-09-22
2026-06
Physical size
8.9 mm thick
51.4 x 51.4 x 14.6 mm including heart-rate sensor; 12.5 mm excluding sensor
Weight
34.4 g without strap
62 g stainless steel / 55 g titanium, without strap
Material
Stainless steel middle frame; PA + glass-fibre reinforced rear shell
Stainless steel or Grade 5 titanium frame/case; fiber-reinforced polymer shell
Water resistance
5 ATM
10 ATM; 45 m freediving; recreational scuba diving
Display type
AMOLED
AMOLED
Display size
1.46 inch
1.5 inch
Display resolution
464 x 464 pixels, 317 ppi
480 x 480 pixels (323 ppi)
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 Amazfit Balance 3
Fact
Oppo Watch S2
Amazfit Balance 3
Battery
Rechargeable battery; 339 mAh typical; 330 mAh rated
Rechargeable battery; 658 mAh
Battery life
Up to 10 days in long-battery mode; up to 7 days with typical use; up to 4 days with AOD
Up to 21 days typical; 10 days heavy use; 7 days AOD; 41 hours accurate GPS; 84 hours power-saving GPS
Charging
Integrated magnetic watch charging cable
Magnetic charging head
3. Sensors & positioning Oppo Watch S2
Fact
Oppo Watch S2
Amazfit Balance 3
GNSS type
Built-in dual-band L1+L5 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
No
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 Mixed
Fact
Oppo Watch S2
Amazfit Balance 3
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)
180+ sports modes
Sleep
Yes (includes sleep apnoea risk assessment on China model)
Yes
Heart rate
Yes
Yes (alerts for arrhythmia and atrial fibrillation)
HRV
Yes (used in AI workout-readiness analysis)
Yes
Stress
Yes
Yes
Blood oxygen
Yes
Yes (all day)
Respiration rate
Yes
Yes
Skin temperature
Yes
Yes
ECG
Yes (China model)
No
Blood pressure
No
No
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
No
Yes
5. Smart features Amazfit Balance 3
Fact
Oppo Watch S2
Amazfit Balance 3
Smartphone compatibility
Android and iOS (China model; Android + Android and Android + iPhone dual-phone combinations supported)
Android 8.0+ and iOS 17.0+
Operating system at launch
ColorOS Watch 17.0.0
Zepp OS 6
Storage
4 GB eMMC
64 GB
Bluetooth
Yes
Yes (5.2)
Wi-Fi
No
Yes (2.4 GHz)
NFC / connected pay
Yes (unencrypted access cards; regional support varies)
Yes (Zepp Pay, region-dependent)
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 (64 GB storage space)
Voice assistant
Xiaobu Assistant (China)
Zepp Flow
6. Navigation & safety Amazfit Balance 3
Fact
Oppo Watch S2
Amazfit Balance 3
Maps
Yes
Yes (base, contour and ski-resort maps)
Offline maps
No
Yes
Navigation
Yes (phone-linked navigation information via Fluid Cloud)
Yes (turn-by-turn, POI search, route planning, round-trip routes and auto-rerouting)
Emergency SOS
No
No
Satellite SOS
No
No
Fall detection
Yes
No
LED flashlight
No
Yes
Diving
No
Yes (45 m freediving; recreational scuba diving)