Fitbit Charge 4 vs. Fitbit Charge HR vs. Polar A370 vs. Polar Loop 2 vs. Xiaomi Mi Band 3 - Instant Comparison

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Fitbit Charge 4

Fitbit Charge HR

Polar A370

Polar Loop 2

Xiaomi Mi Band 3

	Fitbit Charge 4 Check Amazon	Fitbit Charge HR Check Amazon	Polar A370 Check Amazon	Polar Loop 2 Check Amazon	Xiaomi Mi Band 3 Check Amazon
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More Information
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Price and Release Date
Suggested Price	$149	$150	$179.95	$120	$44.95
Release / Update	2020	2015	2017	2015	2018
Activity & Fitness
Calories
Distance
Heart				$
VO2max (Oxygen)
Sleep
Steps
Stress mgt
Female health
Skin temp
Breath rate
Battery
Duration	7 days	5 days	Up to 3 days	8 days (without notifications)	20 days
Rechargeable

Compatibility Support
Android
iOS
Windows Phone
Mac				n/a
Windows	Not yet			n/a
Connectivity Support
Bluetooth
Cellular
GPS
NFC	Fitbit Pay
Wi-Fi
Display
Color
Resolution	66x18	n/a	160 x 80		128 x 80
Size	.721 inches		1.18 inches		0.78 inches
Touch		n/a
Type	OLED	OLED	TFT LCD	LED	OLED
Functions
Audio Speaker
Clock
Phone
Vibration
Voice
Hardware
Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance	5 ATM	1 ATM	WR30	2 ATM	5 ATM
Notifications
Phone
Emails
Texts
Software
Operating System	Fitbit OS	n/a		n/a
Apps
Music	Spotify control
More Information
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