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Xiaomi Watch S4 15th Anniversary Edition vs Fire Boltt Phoenix Ultra

Xiaomi Watch S4 15th Anniversary Edition vs Fire-Boltt Phoenix Ultra comparison

Show Only Differences Highlight Differences	Xiaomi Watch S4 15th Anniversary Edition	Fire-Boltt Phoenix Ultra
key specs
Display Size	36mm	50mm
Compatible OS	Android 8.0 or above, iOS 12.0 or above	Android, iOS
Dial Shape	Round	Round
Display Type	AMOLED	TFT LED
Ideal For	Unisex	Unisex
Strap Colour	-	Blue, Gold, Dark Grey, Silver, Rainbow
Strap Material	-	Silicone
general
Brand	Xiaomi	Fire-Boltt
Model	Watch S4 15th Anniversary Edition	Phoenix Ultra
Release date	May 23, 2025	May 1, 2023
Model Name	Xiaomi Watch S4 15th Anniversary Edition	Phoenix Ultra
Dial Colour	Black	Black
Dial Shape	Round	Round
Size	Regular	Regular
Touchscreen	1.43	Yes
Interchangeable Strap	Yes	Yes
Water Resistant	5 ATM	IP67
Usage	Regular	-
Ideal For	Unisex	Unisex
Strap Colour	-	Blue, Gold, Dark Grey, Silver, Rainbow
Strap Material	-	Silicone
dimensions
Width	47.3	44.6
Height	47.3	11.95
Thickness	12	-
Weight (g)	44.50	55.00
product details
Sensor	Heart Rate Monitor, Stress, Sleep	SpO2 sensor, Heart Rate tracker, Sleep tracker
Compatible Device	Android and iOS	Android, iOS
Battery Type	486mAh	-
Notification	-	Yes
Battery Life	-	7 days
Rechargeable Battery	-	Yes
connectivity features
Bluetooth	Yes	Bluetooth
Bluetooth Version	5.3	-
Wi-Fi	Yes	No
GPS	Yes	No
Other Connectivity Features	NFC, Galileo, Glonass, Beidou, QZSS	-
Call Function	-	Yes
Messaging Support	-	Yes
Email Support	-	No
platform and storage features
Operating System	HyperOS 2	-
Compatible Operating System	Android 8.0 or above, iOS 12.0 or above	Android, iOS
camera and display features
Display Resolution	466 x 466	410x502
Display Size	36mm	50mm
Display Type	AMOLED	TFT LED
Other Display Features	-	60Hz refresh rate
fitness and watch functions
Step Count	Yes	Yes
Calorie Count	Yes	Yes
Heart Rate Monitor	Yes	Yes
Alarm Clock	Yes	Yes
Date & Time Display	Yes	Yes
Language	English	-
Compass	-	No
Calendar	-	No
Chronograph	-	Yes
Number of Buttons	-	1
Other Fitness Features	-	Activity Tracker, 120+ Sports Mode Tracking, Calorie Tracker, Sleep Monitor
Other Watch Functions	-	Alarm Clock, Bluetooth Calling, Voice Assistance, In Built Mic & Speaker, Notifications, Remote Camera Control, Alarm, Timer, Stopwatch, Weather Forecast Feature
ratings
Overall NDTV Rating	-	Read Review
Design and comfort Rating	-
Tracking accuracy Rating	-
Companion app Rating	-
Software and ecosystem Rating	-
Battery life Rating	-
audio and video features
Speaker	-	Yes
Microphone	-	Yes

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