Amazfit T-Rex vs. Garmin Epix Pro Gen 2 vs. Garmin Forerunner 225 vs. Garmin Vivosmart 4 vs. Huawei Fit vs. Nokia (Withings) Activite Sapphire vs. Xiaomi Mi Band 2

	Amazfit T-Rex Check Amazon	Garmin Epix Pro Gen 2 Check Amazon	Garmin Forerunner 225 Check Amazon	Garmin Vivosmart 4 Check Amazon	Huawei Fit Check Amazon	Nokia (Withings) Activite Sapphire Check Amazon	Xiaomi Mi Band 2 Check Amazon
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Price and Release Date
Suggested Price	$140	$699	$300	$130	$130	$450	$23
Release / Update	2019	2023	2015	2018	2016	2014	2016
Activity & Fitness
Calories
Distance
Heart
VO2max (Oxygen)
Sleep
Steps
Stress mgt
Female health
Skin temp
Breath rate
Battery
Duration	20 days	Up to 10 days in smartwatch mode, up to 20 hours in GPS mode	10 hours to 4 weeks	7 days	6 days	8 months	20 hours
Rechargeable

Compatibility Support
Android
iOS
Windows Phone
Mac			n/a		n/a	n/a	n/a
Windows			n/a		n/a	n/a	n/a
Connectivity Support
Bluetooth
Cellular
GPS
NFC
Wi-Fi
Display
Color
Resolution	360 x 360	454 x 454 pixels	180 x 180	48 x 128	208 x 208	n/a
Size	1.3 inches	1.2” AMOLED	1 inch	0.74 inches	1.04 inches	1.3 inches	0.42 inches
Touch
Type	AMOLED	AMOLED		OLED	Memory LCD	Analog	OLED
Functions
Audio Speaker
Clock
Phone
Vibration
Voice
Hardware
Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance	5 ATM	10 ATM (328 feet)	5 ATM	5 ATM	IP68, 5 ATM	5 ATM	IP67
Notifications
Phone
Emails
Texts
Software
Operating System	Built-in	Garmin Watch OS	n/a			n/a	n/a
Apps
Music
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