Xiaomi Watch S4 41mm vs Fitbit Ionic comparison

Show Only Differences Highlight Differences	Xiaomi Watch S4 41mm	Fitbit Ionic
key specs
Display Size	41mm	32mm
Strap Material	Milanese	Elastomer
Dial Shape	Round	-
Ideal For	Unisex	Unisex
Compatible OS	-	Android, iOS
general
Brand	Xiaomi	Fitbit
Model	Watch S4 41mm	Ionic
Release date	September 24, 2025	August 1, 2017
Dial Shape	Round	-
Strap Material	Milanese	Elastomer
Size	Regular	Regular
Touchscreen	1.32	Yes
Water Resistant	5ATM	Yes
Water Resistance Depth	50 m	50 metres
Usage	Regular	-
Dial Material	Stainless steel	-
Ideal For	Unisex	Unisex
dimensions
Width	41.2	-
Height	41.2	-
Diameter	9.5	-
Weight (g)	32.00	303.30
product details
Sensor	Heart rate sensor (with blood oxygen sensor), Accelerometer, Gyroscope, Ambient light sensor, Electronic compass, Barometer sensor, Temperature sensor	3-axis Accelerometer, 3-axis Gyroscope, Optical Heart Rate Sensor, Altimeter, Ambient Light Sensor
Battery Type	320mAh	Lithium Polymer
Battery Life	8 days	-
Compatible Device	-	Android, iPhone
Notification	-	Yes
Notification Type	-	Vibration
Charge Time	-	120 minutes
Stand By Time	-	Upto 6 Days
Rechargeable Battery	-	Yes
connectivity features
Call Function	Yes	-
Bluetooth	Yes	Yes
Bluetooth Version	5.4	-
GPS	Yes	Yes
Wi-Fi	-	Yes
Other Connectivity Features	-	NFC
platform and storage features
Operating System	Xiaomi HyperOS 3	Fitbit OS
Compatible Operating System	-	Android, iOS
camera and display features
Display Resolution	466 × 466	240x180
Display Size	41mm	32mm
Other Display Features	1500nits, 60Hz refresh rate	-
fitness and watch functions
Step Count	Yes	Yes
Heart Rate Monitor	Yes	Yes
Altimeter	Yes	-
Compass	Yes	-
Calendar	Yes	Yes
Alarm Clock	Yes	Yes
Date & Time Display	Yes	Yes
Language	English	-
Calorie Count	-	Yes
Chronograph	-	Yes
Number of Buttons	-	3
audio and video features
Speaker	Yes	-
Microphone	Yes	-

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