Xiaomi Watch S4 15th Anniversary Edition vs boAt Ultima Ember comparison

Show Only Differences Highlight Differences	Xiaomi Watch S4 15th Anniversary Edition	boAt Ultima Ember
key specs
Display Size	36mm	-
Compatible OS	Android 8.0 or above, iOS 12.0 or above	-
Dial Shape	Round	Rectangle
Display Type	AMOLED	AMOLED
Ideal For	Unisex	Unisex
general
Brand	Xiaomi	boAt
Model	Watch S4 15th Anniversary Edition	Ultima Ember
Release date	May 23, 2025	February 22, 2025
Model Name	Xiaomi Watch S4 15th Anniversary Edition	-
Dial Colour	Black	-
Dial Shape	Round	Rectangle
Size	Regular	-
Touchscreen	1.43	1.96
Interchangeable Strap	Yes	-
Water Resistant	5 ATM	IP68
Usage	Regular	Regular
Ideal For	Unisex	Unisex
dimensions
Width	47.3	-
Height	47.3	-
Thickness	12	-
Weight (g)	44.50	-
product details
Sensor	Heart Rate Monitor, Stress, Sleep	heart rate, SpO2, steps, sleep tracker
Compatible Device	Android and iOS	-
Battery Type	486mAh	300mAh
Battery Life	-	15 days
connectivity features
Bluetooth	Yes	Yes
Bluetooth Version	5.3	-
Wi-Fi	Yes	-
GPS	Yes	-
Other Connectivity Features	NFC, Galileo, Glonass, Beidou, QZSS	-
Call Function	-	Yes
platform and storage features
Operating System	HyperOS 2	-
Compatible Operating System	Android 8.0 or above, iOS 12.0 or above	-
camera and display features
Display Resolution	466 x 466	368 x 448
Display Size	36mm	-
Display Type	AMOLED	AMOLED
Other Display Features	-	Always-On Display
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	English
Calendar	-	Yes
audio and video features
Speaker	-	Yes
Microphone	-	Yes

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