Xiaomi Watch S4 15th Anniversary Edition vs Xiaomi Mi Band 9 comparison

Show Only Differences Highlight Differences	Xiaomi Watch S4 15th Anniversary Edition	Xiaomi Mi Band 9
key specs
Display Size	36mm	-
Compatible OS	Android 8.0 or above, iOS 12.0 or above	-
Dial Shape	Round	Rectangle
Display Type	AMOLED	-
Ideal For	Unisex	Unisex
general
Brand	Xiaomi	Xiaomi
Model	Watch S4 15th Anniversary Edition	Mi Band 9
Release date	May 23, 2025	July 19, 2024
Model Name	Xiaomi Watch S4 15th Anniversary Edition	-
Dial Colour	Black	-
Dial Shape	Round	Rectangle
Size	Regular	Regular
Touchscreen	1.43	1.62
Interchangeable Strap	Yes	Yes
Water Resistant	5 ATM	5ATM
Usage	Regular	Regular
Ideal For	Unisex	Unisex
dimensions
Width	47.3	21.6
Height	47.3	46.5
Thickness	12	10.99
Weight (g)	44.50	15.80
product details
Sensor	Heart Rate Monitor, Stress, Sleep	Optical heart rate, blood oxygen, six-axis motion
Compatible Device	Android and iOS	-
Battery Type	486mAh	233
connectivity features
Bluetooth	Yes	Yes
Bluetooth Version	5.3	5.4
Wi-Fi	Yes	-
GPS	Yes	-
Other Connectivity Features	NFC, Galileo, Glonass, Beidou, QZSS	-
platform and storage features
Operating System	HyperOS 2	HyperOS
Compatible Operating System	Android 8.0 or above, iOS 12.0 or above	-
camera and display features
Display Resolution	466 x 466	192 x 490
Display Size	36mm	-
Display Type	AMOLED	-
fitness and watch functions
Step Count	Yes	Yes
Calorie Count	Yes	-
Heart Rate Monitor	Yes	Yes
Alarm Clock	Yes	-
Date & Time Display	Yes	Yes
Language	English	-
Calendar	-	Yes

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