Amazfit GTS vs. Apple Watch 4 vs. Apple Watch 7 vs. Fitbit Charge 6 vs. Fitbit Versa 4 vs. Garmin Forerunner 255 vs. Polar A370 vs. Samsung Galaxy Watch 4

	Amazfit GTS Check Amazon	Apple Watch 4 Check Amazon	Apple Watch 7 Check Amazon	Fitbit Charge 6 Check Amazon	Fitbit Versa 4 Check Amazon	Garmin Forerunner 255 Check Amazon	Polar A370 Check Amazon	Samsung Galaxy Watch 4 Check Amazon
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Price and Release Date
Suggested Price	$150	$329	$429	$159	$300	$400	$179.95	$250
Release / Update	2019	2018	2021	2023	2022	2022	2017	2021
Activity & Fitness
Calories
Distance
Heart
VO2max (Oxygen)
Sleep
Steps
Stress mgt
Female health
Skin temp
Breath rate
Battery
Duration	14 days	Not yet	18 Hours	Up to 7 days	6 days	14 days	Up to 3 days	40 Hours
Rechargeable

Compatibility Support
Android
iOS
Windows Phone
Mac
Windows
Connectivity Support
Bluetooth
Cellular
GPS
NFC
Wi-Fi
Display
Color
Resolution	348 x 442	384 x 480	396 x 484		40,5x40,5	260x260	160 x 80	396 x 396
Size	1.65 inches	1.78 inches	1.9 inches	1.04-inch AMOLED	1,58 inches	1.3 inches	1.18 inches	1.9 inches
Touch
Type	AMOLED	MicroLED	MicroLED	AMOLED	AMOLED	AMOLED	TFT LCD	AMOLED
Functions
Audio Speaker
Clock
Phone
Vibration
Voice
Hardware
Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance	5 ATM	Not yet	water resistant but not waterproof	Water-resistant up to 50m	5 ATM (50 Meters)	5 ATM (50 Meters)	WR30	5 ATM (50 Meters)
Notifications
Phone
Emails
Texts
Software
Operating System	Wear OS	WatchOS 5	WatchOS 8	Fitbit OS	Fitbit OS	Built-in		Wear OS 3
Apps
Music
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