Fitbit Charge 4 vs Mi Smart Band 3i comparison

Show Only Differences Highlight Differences	Fitbit Charge 4	Mi Smart Band 3i
key specs
Water Resistant	Yes	Yes
Heart Rate Monitor	Yes	No
Compatible Devices	iOS and Android	Android phones, iPhone
Battery Life (Days)	7	20
Display Type	-	AMOLED
general
Brand	Fitbit	Mi
Model	Charge 4	Smart Band 3i
Release date	March 31, 2020	November 1, 2019
Reading Type	Digital	Digital
Ideal For	Unisex	Unisex
Suitable For	Sports, Fitness	Sports, Fitness
Water Resistant	Yes	Yes
Model Name	-	Band 3i
Color	-	Black
Material	-	Thermoplastic
Touch Enabled	-	Yes
Function	-	Show Time/Date, Alarm Clock, Display / Reject Calls, View Messages, Idle Alert, Phone Unlock, Event Reminders, Phone Locator, Weather Forecast, App Notifications,
Dial Shape	-	Oval
display and battery features
Battery Life (Days)	7	20
Battery Type	Lithium Polymer (Li-poly)	Lithium Ion (Li-ion)
Display Resolution	-	128 x 80 Pixels
Display Type	-	AMOLED
Backlight Present	-	Yes
Charge Time (hours)	-	2.5
Battery Capacity (mAh)	-	110
performance features
Water-Resistant Depth (metres)	50	-
connectivity features
Bluetooth Enabled	Yes	Yes
Bluetooth Version	v4	v4.2
Wi-Fi Enabled	-	No
compatibility
Compatible Devices	iOS and Android	Android phones, iPhone
Compatible Android Version	-	Android 4.4 and above
Compatible iOS Version	-	iOS 9.0 and above
activity tracking function
Heart Rate Monitor	Yes	No
Step Counter	Yes	Yes
Alarms	-	Yes
Calories Burned	-	Yes
Distance Covered	-	Yes
Do Not Disturb Mode	-	Yes
Phone Notifications	-	Yes
Reminders	-	Yes
Sedentary Reminder	-	Yes
Sleep Tracking	-	Yes
sensors
Accelerometer	Yes	Yes
Barometric Altimeter	Yes	-
Optical Heart Rate Sensor	Yes	-
Vibration Motor	Yes	-
Pedometer	-	Yes
dimensions
Width (mm)	22.7	-
Height (mm)	35.8	-
Depth (mm)	12.5	-
workout modes
Treadmill	-	Yes
Exercise	-	Yes
Outdoor Running	-	Yes
Cycling	-	Yes
Walking	-	Yes

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