Amazfit GTS 4

Works with: iPhone and Android
Display: AMOLED, 1.75 in
Case sizes: 43 mm
Battery: 8 days
GPS battery: 28 hours
Water resistance: 5 ATM
Weight: 27 g

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Amazfit GTS 4 at a glance

Battery

About a week

Up to 8 days in smartwatch mode. 28 hours with GPS.
GPS

Multi-band GPS

No maps. Runs and rides without your phone.
Display

AMOLED, 1.75 in

1.75 in, always-on option and touchscreen.
Health

Heart, sleep and more

Measures blood oxygen.
Phone & smart

iPhone and Android

Music and calls.
Build

5 ATM water rating

27 g.

Amazfit GTS 4 full specifications

Overview

Brand	Amazfit
Model	GTS 4
Series	GTS
Colours	Infinite Black, Misty White, Autumn Brown, Rosebud Pink

Platform & apps

Works with iPhone and Android phones, running Zepp OS.

It has an app store for extra apps and watch faces.

Operating system	Zepp OS
Works with	iPhone and Android
Minimum iOS	iOS 12
Minimum Android	Android 7
Storage	2.3 GB
App store	Yes

Display

A bright, colourful screen that looks like a phone display.

1.75 in, always-on option and touchscreen.

Display type	AMOLED
Display name	HD AMOLED
Screen size	1.75 in
Resolution	390 x 450
Colour display	Yes
Always-on display	Yes
Touchscreen	Yes
Controls	touchscreen, buttons, crown

Design & durability

A 43 mm case weighing 27 g.

Rated 5 ATM: fine for swimming laps and showers.

Case sizes	43 mm
Case shape	Rectangular
Dimensions	42.7 x 36.5 x 9.9 mm
Thickness	9.9 mm
Weight (case)	27 g
Case material	Aluminum alloy middle frame
Lens	Tempered glass
Back material	high-gloss sprayed PC
Band material	Fluoroelastomer / Liquid Silicone / Nylon
Band width	20 mm
Band fitting	Quick Release
Fits wrists	140-200 mm
Water resistance	5 ATM
Water standard	ISO 22810:2010

Battery

About a week: up to 8 days in smartwatch mode.

With GPS on, up to 28 hours, or 16 hours in multi-band mode. Makers test with their own settings, so treat these as best-case figures.

Battery (smartwatch mode)	8 days
Battery (GPS)	28 hours
Battery (multi-band GPS)	16 hours
All battery modes	Smartwatch: 8 days; Battery saver: 16 days; Battery saver: 30 days; Smartwatch: 4 days; Multi-band GPS: 16 hours; GPS: 28 hours; Max battery GPS: 33 hours
Battery capacity	300 mAh
Charging	puck
Full charge time	120 min

GPS & navigation

Built-in multi-band GPS for accurate tracks, even near tall buildings and trees.

Navigation shows a breadcrumb trail, not a full map.

GPS	Built-in
Multi-band GPS	Yes
Satellite systems	GPS, GLONASS, Galileo, BeiDou, QZSS
Maps	Breadcrumb trail
Navigation features	course import, back-to-start, real-time navigation, track run mode, smart trajectory correction, virtual pacer

Health & sensors

Tracks heart rate around the clock, plus blood oxygen.

For sleep, it offers a nightly sleep score.

Sensors	optical HR, SpO2, accelerometer, gyroscope, compass, barometer, ambient light
Heart-rate sensor	BioTracker 4.0 PPG biometric sensor
Heart-rate tracking	24/7
High/low heart-rate alerts	Yes
Blood oxygen (SpO2)	Yes
Respiration rate	Yes
Sleep tracking	Sleep score
Stress tracking	Yes
Energy score	PAI
Cycle tracking	Yes

Training

Tracks 154+ sports and activities.

Sport profiles	154
Auto activity detection	Yes
Underwater heart rate	Yes
Training metrics	VO2 max, recovery time, training load, training effect
Strength rep counting	Yes

Smart features

Smart extras include music storage and calls on the wrist.

Voice assistant: Alexa.

Notifications	Yes
Message replies	Android
Calls on the watch	Yes
Speaker	Yes
Microphone	Yes
Voice assistant	Alexa
Music storage	Yes
Wi-Fi	2.4 GHz
Bluetooth	Bluetooth 5.0
Find my phone	Yes

Specs compiled from Amazfit's product pages and datasheets, with some identifiers from Open Icecat. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.