OPPO Watch S vs Samsung Galaxy Watch 4 (40mm) comparison

Show Only Differences Highlight Differences	OPPO Watch S	Samsung Galaxy Watch 4 (40mm)
key specs
Strap Colour	Green, Black	Black, Pink Gold, Silver
Compatible OS	Android 10 and later, and iOS 14 and newer	Android
Strap Material	Rubber	-
Dial Shape	Round	Round
Display Type	AMOLED	AMOLED
Display Size	-	40mm
Ideal For	-	Unisex
general
Brand	OPPO	Samsung
Model	Watch S	Galaxy Watch 4 (40mm)
Release date	October 16, 2025	August 11, 2021
Model Name	Watch S	Galaxy Watch 4
Dial Colour	Silver, Black	Black, Pink Gold, Silver
Dial Shape	Round	Round
Strap Colour	Green, Black	Black, Pink Gold, Silver
Strap Material	Rubber	-
Size	Large	Regular
Touchscreen	1.46-inch AMOLED	Yes
Interchangeable Strap	Yes	Yes
Water Resistant	5ATM + IP68	IP68
Dial Material	Stainless Steel	Aluminium
Water Resistance Depth	-	5 ATM
Ideal For	-	Unisex
dimensions
Width	44.98mm	40.4
Height	44.98mm	39.3
Thickness	8.9mm	9.8
Weight (g)	35.00	25.90
product details
Sensor	eight-channel optical heart rate sensor, 16-channel optical pulse oximeter sensor, ECG sensor, a wrist temperature sensor, accelerometer, gyroscope, geomagnetic sensor, air pressure sensor, ambient light sensor,	Samsung BioActive Sensor (Optical Heart Rate + Electrical Heart + Bioelectrical Impedance Analysis), Accelerometer, Barometer, Gyro Sensor, Geomagnetic Sensor, Light Sensor
Battery Life	Up to 10 days	-
Charge Time	90 minutes	-
Charger Type	Wireless	-
Compatible Device	-	Android
Notification	-	Yes
Rechargeable Battery	-	Yes
connectivity features
Bluetooth	Yes	Yes
Bluetooth Version	5.2	5.0
Wi-Fi	Yes	Yes
GPS	Yes	Yes
platform and storage features
Operating System	ColorOS Watch 7.1	One UI Watch 3
Compatible Operating System	Android 10 and later, and iOS 14 and newer	Android
Processor Name	BES2800BP	Exynos W920
Internal Memory	4GB EMMC	16GB
RAM	-	1.5GB
camera and display features
Display Resolution	464x464	396x396
Display Type	AMOLED	AMOLED
Display Size	-	40mm
Scratch Resistant	-	Yes, Gorilla Glass DX
fitness and watch functions
Step Count	Yes	Yes
Calorie Count	Yes	Yes
Heart Rate Monitor	Yes	Yes
Altimeter	Yes	-
Compass	Yes	Yes
Calendar	Yes	Yes
Alarm Clock	Yes	Yes
Date & Time Display	Yes	Yes
Number of Buttons	2	2
Other Fitness Features	sleep tracking, sleep snoring assessment, sleep SpO2 level measurement, sleep quality score, sleep breathing rate monitoring	-
Language	-	English
Other Watch Functions	-	Heart rate, blood oxygen, SpO2 Sensor
audio and video features
Speaker	-	Yes

Popular Smartwatch Brands