Amazfit GTR 4 User manual

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Amazfit GTR 4 User Manual
(English Edition)
Connection and Pairing
Use your phone to scan the following QR code, and download and install the Zepp app. For a
better user experience, update the app to the latest version as prompted.
Note: Your mobile phone must run on Android 7.0 or iOS 12.0 or higher.
Initial pairing:
When the watch is started for the first time, the QR code used for pairing displays on the
screen.
Open the Zepp app on your phone, log in to the app, and scan the QR code on the watch to
pair your phone with the watch.
Pairing with a new phone:
1. Open the Zepp app on your old phone and synchronize data with the watch.
2. On the old mobile phone, go to Profile > Amazfit GTR 4 page and tap the Unpair button
at the bottom to unpair. If it is an iPhone, after unbinding in the Zepp app, you need to unpair
the phone and watch. Go to Settings > Bluetooth, find the Bluetooth name corresponding to
the watch, and tap the button on the far right of the Bluetooth name. After entering the page,
tap Ignore This Device.
3. Restore the factory settings of the watch, and then pair the watch with your new phone
as described in the initial pairing procedure.
Updating Watch System
Keep the watch connected to your phone, open the Zepp app, and go to Profile > My
devices > Amazfit GTR 4 > System Update to view or update the system of your watch.
We recommend that you tap Update Immediately when your watch receives a system update

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message.
Wearing
1. Wear the watch strap not too tight or too loose, and leave enough space for the skin to
breathe. This makes you feel comfortable and allows the sensor to function.
2. When measuring blood oxygen, wear the watch correctly. Avoid wearing the watch on the
wrist joint, keep your arm flat, maintain comfortable (appropriately tight) fitting between the
watch and the wrist skin, and keep your arm still throughout the measurement process. When
affected by external factors (arm sag, arm sway, arm hair, tattoo, etc.), the measurement result
may be inaccurate or the measurement may fail with no output.
3. We recommend that you tighten the watch strap during workout and loosen it afterwards.
Basic Operations
Commonly used gestures and buttons
Operation
Corresponding Result
Tap the screen
Uses a feature, selects the current item, or proceeds with the
next step
Press and hold the watch
face
Activates watch face selection and watch face settings
Cover the screen
Turns off the screen
Swipe from left to right
On most sub-level pages, returns to the upper-level page
Swipe up or down on the
screen
Scrolls or switches pages
Rotate the digital crown
Scrolls or switches pages
Press and hold the upper
button for five seconds or
longer
Powers on, accesses the restart page, and performs force
restart
Control center
Swipe down on the watch face page to enter the Control Center, where you can access system
features of the watch.
Supported features include Power Saving mode, DND, Sleep mode, Theater mode, Calendar,
Volume, Keep Screen On, Brightness, Settings, Flashlight, Bluetooth, Wi-Fi, Screen Lock,
and Find My Phone.
Find the phone
1. Keep the watch connected to your phone.

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2. On the watch face page, swipe down to go to the control center, and tap Find My Phone
. Your phone will vibrate. Tap the ring button, and your phone will ring.
3. In the app list, tap Find My Phone, and your phone will vibrate. Tap the ring button, and
your phone will ring.
Find the watch
Keep the watch connected to your phone, open the Zepp app, go to Profile > My devices >
Amazfit GTR 4, and tap Find Watch. Then, your watch will vibrate and ring. (The default
setting is to vibrate only, and the alert tone needs to be set manually: Go to Watch Settings >
Sound and Vibration > Ring for Alert to turn on the switch.)
Watch Face
Watch face compilations
Some watch faces support editing compilations . With compilations , you can view steps,
calories, weather, and other information, and edit the information as needed.
Edit watch face compilations:
1. After waking up the watch, press and hold the watch face to enter the watch face selection
page, where you can choose other watch faces or edit the compilations .
2. Swipe left or right on the screen to preview the watch faces currently available. The Edit
button is displayed at the bottom of a watch face that supports compilations. Tap the
button to go to the page for editing the compilations of this watch face.
3. Select the compilation to edit. Tap a compilation, or swipe up or down on the screen to
switch between compilations.
4. After editing, press the upper button to complete editing and enable the watch face.
Always On Display
If this feature is enabled, the screen still displays time and some information of the watch face
in standby mode, which greatly reduces the battery life.
Set Always On Display:
1. After you wake up your watch, press the upper button to access the app list. Then, go to
Settings > Display > Always On.
2. Select the screen style and enable status for Always On Display.
Add watch faces
In addition to the built-in watch faces, you can choose online watch faces as desired from the
watch face store in the Zepp app and synchronize them to the watch. You can also use a photo
you took using your phone or use an image in the album as a custom background watch face.
Add online watch faces:
1. Keep the watch connected to your phone, open the Zepp app, and go to Profile > My
devices > Amazfit GTR 4 > Watch Faces.
2. Select one or more watch faces, and then synchronize them to the watch to give yourself
multiple options.
Add customized watch faces:

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Keep the watch connected to your phone, open the Zepp app, go to Profile > My devices >
Amazfit GTR 4 > Watch Faces > Custom Background, and tap your preferred style to change
background by selecting a photo from your phone’s Albums or taking a photo with your
phone’s camera..
Change watch faces
1. After waking up the watch, long press the watch face to enter the watch face selection
screen.
2. Swipe left or right on the screen to preview watch faces available on the watch,
including built-in watch faces and synchronized online watch faces.
3. Tap the desired watch face to replace the current watch face.
Delete watch faces
When the storage space on the watch is almost full, you will need to delete some of the watch
faces to make room for new ones (retain at least one watch face).
1. After waking up the watch, long press the watch face to enter the watch face selection
screen.
2. Swipe left or right on the screen to preview watch faces available on the watch,
including built-in watch faces, synchronized online watch faces, and customized watch faces.
3. Swipe up on the screen. For watch faces with a button, you can tap the button to
delete the watch face.
State points
The state point is displayed on the top of the watch face to indicate the functions currently
enabled on the watch, such as the Theater Mode turned on in the watch or the Countdown app
running in the background.
The supported display states are:
•Low battery
•Power saving mode
•DND mode
•Sleep mode
•Theater mode
•Stopwatch (tap the state point to go to the app)
•Countdown (tap the state point to go to the app)
•Music playing (tap the state point to go to the app)
•In workouts (tap the state point to go to the app)
•Charging
Notifications and Calls
App alerts
Keep the watch connected to your phone to receive the phone app alerts on your watch. On
the watch face page, you can swipe up to view the latest 20 alerts in the notification center.
Clearing all notifications:

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There is a Clear button at the bottom of the notification list. Tap it to clear all
notifications.
Or, after the watch restarts, notifications will be automatically cleared.
Clearing a single notification:
When a notification is pushed, or after you open a specific notification from the notification
list, you can delete the notification by pressing the delete button at the bottom.
Setting method:
Keep the watch connected to your phone, open the Zepp app, go to Profile > My devices >
Amazfit GTR 4 > Notifications and Reminders > App Alerts, and enable alerts for apps as
needed.
Note:
•To enable this feature on an Android phone, you need to add the Zepp app to the allowlist or
auto-run list in the phone's background so that the app always runs in the background. If the
Zepp app is terminated by the phone's background process, the watch will be disconnected
from your phone, and you cannot receive app notifications on the watch.
•For iOS, there are limited apps that can be set in the Notifications and Reminders just after
the watch is activated. As the phone receives the notification messages from more apps, more
apps will be displayed in the Notifications and Reminders of the Zepp app.
Bluetooth calling
•Once this feature is enabled, pair the watch with your phone via Bluetooth and maintain the
connection to receive calls on the watch.
•While the watch and your phone are connected via Bluetooth, you can also make Bluetooth
calls on the watch through the Phone app.
Bluetooth calling setup methods:
Method one: Start the Zepp app, go to Profile > Amazfit GTR 4 > App Settings > Phone,
enable Bluetooth calls, and pair the watch and your phone via Bluetooth as instructed.
Method two: On your phone, go to Settings > Bluetooth to pair the watch with your phone:
1. On your phone, go to Settings > Bluetooth, and enable the Bluetooth to make the phone
discoverable. On the watch, go to the app list, tap Settings > Network & Connections >
Bluetooth, and ensure the Bluetooth is enabled.
2. Find the watch in the search results for available devices on your phone, and tap to pair the
devices.
Incoming Call Alerts
To enable this feature, open the Zepp app, and go to Profile > Amazfit GTR 4 > App
Settings > Phone>Incoming call. Once the feature is enabled, and while the watch and phone
are connected, the watch will display a prompt when the phone receives a call, and you can
ignore or hang up the call on the watch.
Morning Updates
With Morning Updates enabled, the device will push updates every morning. You can quickly
view information such as today's weather, workout status, health status, and personal affairs,
and get prepared for the new day.
You can enable or disable the Morning Updates feature on the device under Settings >
Preferences > Morning Updates. You can also tap Content Settings to adjust the content and
display order in Morning Updates.
The above settings can also be accessed in the Zepp app under Profile > Amazfit GTR 4 >

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Watch Settings > Morning Updates while keeping the watch connected to the phone.
Shortcuts
Shortcut Cards
Swipe right on the watch face to go to the Shortcut Cards page, where you can easily use and
view various features and information:
You can add frequently used feature cards to Shortcut Cards page for more convenient access,
such as your latest event, next alarm, or recent BPM data.
You can also open the Zepp app and go to Profile > Amazfit GTR 4 > Shortcut Cards, where
you can set shortcut cards to display and their display order.
Quick Access Apps
Swipe left on the watch face to view quick access apps. Quick access apps allow you to
conveniently access watch features. You can add your frequently used apps and features, such
as "Workout".
Change quick access apps:
1. After waking up the watch, press the upper button to open the app list. Go to Settings >
Preferences > Widget, and swipe up or down on the screen to view the apps that can be added
to Quick Access Apps.
2. When the number of "Current apps" reaches the upper limit, but you want to add new
apps, remove redundant apps first, and then add the ones you need.
Press buttons for quick start-up
You can go to Watch > Settings > Preferences > Long Press Upper Button/Press Lower
Button > select the app to be quickly launched, and then you can quickly open the previously
set app by operating the corresponding button.
Triggering methods:
•Press and hold the upper button.
•Press the lower button.
Workouts
Workout modes
The watch supports over 150 workout modes, including running & walking, cycling,
swimming, outdoor sports, indoor sports, dance, combat sports, ball sports, water sports,
winter sports, leisure sports, board & card games, and others.
Workout list
1. Tap Workout in the watch App list or press the corresponding button on the watch face (if
quick start-up is set for workouts) to go to the workout list.
2. Select the workout to start in the workout list.
3. Select More Workouts to view all workout modes and start a workout.

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4. Tap to edit the workout list, where you can add, delete, and sort workouts.
Choose a workout
In the workout list, swipe up or down on the screen or rotate the digital crown to select the
workout to start.
Start a workout
After entering the workout preparation page, for the workouts that require positioning, the
device will automatically search for a GPS signal. The red status bar indicates that the watch
is searching for a signal, and it will turn green once the signal is found. We recommend that
you tap the workout icon to enter the workout after a successful GPS positioning, which can
improve the accuracy of the workout data calculation.
For workouts that do not require positioning, you can directly tap the green status bar on the
workout preparation page to start the workout.
Workout operations
Turn pages during a workout
During a workout, you can either swipe up or down on the screen or rotate the digital crown
to turn pages. Swipe left or right to turn the pages left and right. On the left side of the
workout data page, you can pause or end the workout. On the right side of the workout data
page, you can control music playback on the watch app or the mobile phone.
Workout screen lock status
After auto screen lock is enabled, the screen will turn off during workouts/in AOD
mode/when the screen times out, and the status bar will display the icon.
In this state, the touch screen cannot be operated. You need to press the button to unlock the
touch screen before you perform any operation, or you can directly press the button to
perform workout operations.
For swimming, the touch screen will be continuously disabled during the workout, and can

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only be used after you pause or finish the workout by pressing the button.
Button definitions during workouts:
•When the screen is locked, press the upper button to unlock.
•When the screen is unlocked, press the upper button to pause/start the workout.
•When the screen is unlocked, press the lower button to start a new lap/set.
Workout operations page
1. Pause/resume
Tap to enter the workout pause/resume page.
2. End
Tap to end the current workout and save the data.
3. Workout Assistant
Tap to modify some of the workout assistant settings (can be modified on the page when
pause the workout).
4. Resume later
Press to save the current workout and return to the watch face. Enter the workout app again to
return to the workout pause page.
5. More
Press to modify some of the settings.
Workout settings
On the workout preparation page, you can swipe up to go to the workout settings page to set
the current workout mode. The related parameters vary depending on the workout mode.
Workout assistant
The workout assistant provides auxiliary tools for your workout, including the workout goals,
workout alerts, auto laps, auto pause, cadence assistant, and virtual pacer. Auxiliary features
provided by the workout assistant vary depending on workouts.
Workout goals
You can set workout goals, such as the duration, distance, calories, and effect in Workout
Goal. The watch displays the current goal progress in real time during workouts. A message
displays upon you achieve the preset workout goal. Workout goals vary depending on
workouts.
Workout alerts
In this setting, you can set various reminders according to your needs, such as Distance
Reminder, Heart Rate Reminder, etc. Workout alerts vary according to the workout.
1. Distance reminder
The watch vibrates and displays the duration that you use for each full kilometer/mile during
the workout.
Go to Workout Mode > Settings > Assistant > Workout Alerts > Distance, set a target
distance, and enable this feature.

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2. Safe heart rate reminder
During a workout, if the watch detects that your heart rate exceeds the safe heart rate value
you have set, it will vibrate and display a message on the screen. In this case, you need to
slow down or stop.
Go to Workout Mode > Settings > Assistant > Workout Alerts > Safe Heart Rate, set a safe
heart rate value, and enable the feature.
3. Heart rate range alert
During a workout, if the watch detects that your heart rate does not fall within the configured
heart rate range, it will vibrate and display a message on the screen. In this case, you need to
speed up or slow down to ensure that your heart rate is within the configured range.
To set the feature, go to Workout Mode > Settings > Assistant > Workout Alerts > Heart Rate
Zone, set a heart rate zone, and enable this feature.
4. Pace alert
You can set a maximum/minimum pace value. If your pace exceeds the preset value, the
watch will vibrate and display a message.
Go to Workout Mode > Settings > Assistant > Workout Alerts > Fastest/Slowest Pace, set a
pace, and enable or disable this feature.
Additionally, the watch also supports alerts for the following: high speed, trips, speed, stroke
frequency, cadence, time, calorie, drinking, energy intake, return, and rest period.
Cadence assistant
You can set the cadence per minute and the reminder frequency. During a workout, the watch
can sound or vibrate according to the set cadence, so that you can control your cadence.
Go to Workout Mode > Settings > Assistant > Cadence Assistant, set the cadence per minute
and the reminder frequency, and enable this feature.
Virtual pacer
After you set a pace value of the virtual pacer, the current pace, the distance leading/lagging
the virtual pacer, and your position in relation to the virtual pacer can be displayed during
workouts.
Go to Outdoor Running/Treadmill > Settings > Assistant > Virtual Pacer, set the pace of the
virtual pacer, and enable this feature.
Auto lap
This feature is available for some workouts. You can set the auto lap distance in the workout
settings, and the watch will start an auto lap and remind you each time you reach the set
distance during a workout. Also, when the screen is on and unlocked during a workout, you
can press the lower button of the watch to manually start a lap.
The watch also records the workout details of each lap for both manual laps and auto laps.
After the workout ends, you can view details of different laps.
Go to Workout Mode > Settings >Assistant > Auto Lap, and set the auto lap distance. Manual
laps do not require any setting.
Auto pause
Enable or disable Auto pause. After the function is enabled, the workout will be automatically
paused when the workout speed is too low. When the speed increases to a certain threshold,

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the workout can be resumed. You can also resume the working during the pause. The auto
pause threshold can be customized for some workouts.
Go to Workout Mode > Settings > Assistant > Auto pause
Training
Interval training
This feature is available for some workouts. On the watch, you can directly edit the training
stage, rest stage and loops of interval training. When you use interval training, it will be
performed according to settings you did. After this stage is completed, the training
automatically goes to the next stage.
You can edit the training stages and rest stages by distance, time, and trips as well as in a
customized way. The items for editing vary according to the workout.
Go to Workout Mode > Settings > Training > Interval training
More
Edit data items
You can edit data items during workouts, including editing the workout data and charts,
deleting, adding or sorting data pages.
Optional values of the data page format include 1, 2, 3, 4, 5 or 6 data items per page.
More than 150 workout data items are supported (specific supported data items vary by
workouts).
More than 8 types of real-time charts are supported, including pace, elevation, and more.
Up to 10 pages of data/workout charts can be added.
3D data mode
You can enable or disable the function for some workouts in workout settings. If the function
is enabled, the watch calculates distance using 3D data, as shown in the preceding figure. As
shown in the picture, after 3D distance is enabled, the slope distance of the route will be
calculated, the altitude and slope changes will be considered, and the calculated distance will
match the actual distance of the route. If 3D distance is not enabled, the projected distance
will be calculated based on the route traversed, namely the 2D distance shown in the picture.

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Wrist side
For some workouts, such as tennis, you need to wear the device on the hand that holds the
racket, and workout data is more accurate when you wear the watch on the preset side.
If the right hand is used to hold the racket, you need to wear the watch on that hand.
Go to Tennis/Rowing Machine > Settings > More > Watch-wearing Hand for settings.
Swimming pool length
Refers to the length of lanes in your swimming pool. The watch calculates swimming data
based on the lane length you set.
Set the corresponding lane length for each pool so that the watch can accurately evaluate your
swimming data.
Go to Pool Swimming > Settings > More > Lane Length for settings.
Recalibrate
In the treadmill workout mode, if the distance recorded by the watch and the actual distance
are still significantly different after multiple calibrations, try recalibrating the treadmill
recording algorithm to record treadmill data more accurately.
Go to Treadmill > Settings > More > Recalibrate for settings.
Down swing direction
For some workouts, for example, golf, you need to wear the device on the hand in the
direction of down swing direction, so that workout data is more accurate.
If the down swing direction is to the left (i.e. hitting the ball from right to left), the watch
needs to be worn on the left hand.
Go to Golf Swing > Settings > More > Swing Direction for settings.
Track length & track selection
In the sports field running workout, it is necessary to set the track length and track lane, which
can make the workout data more accurate.
Go to Sports Field Running > Settings > More > Sports Field Running Settings > Sports Field
Distance & Track Selection for settings.
Special workout modes - swimming
Workout terms
Trip: Refers to the lane length in pool swimming mode.
Stroke: Refers to a complete stroke motion while you are wearing the watch.
Stroke rate: Refers to the number of strokes per minute.
DPS: Refers to the distance of a complete stroke.
SWOLF: It is an important indicator of swimming scores, which comprehensively evaluates
your swimming speed. SWOLF in pool swimming mode = Duration of a single lap (in
seconds) + Number of strokes in a single lap. In open-water swimming mode, SWOLF is
calculated using a lap distance of 100 meters. A smaller SWOLF score indicates higher
swimming efficiency.
Stroke recognition

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The watch recognizes strokes in swimming modes and displays the main stroke you use.
Stroke Type
Definition
Freestyle
Freestyle stroke
Breaststroke
Breaststroke
Backstroke
Backstroke
Butterfly
Butterfly
Medley
More than one stroke is used when swimming, with each stroke in
a similar proportion
Touch screen during swimming
To protect the touch screen from unintentional touches and water interference, the watch
automatically disables the touch screen function after you start swimming. In this case, you
can control the workout with the watch buttons. After the workout ends or is paused, the
watch will update and re-enable the touch screen feature.
Workout GPS positioning
If you select Outdoor workouts, wait until GPS positioning is successful on the Workout
preparation screen. Then, tap: green status bar to begin the workout. This allows the watch to
record complete workout data and prevents data inaccuracy due to workout tracking loss.
Positioning guide:
If you receive a prompt to update the AGPS after selecting a workout, start the Zepp app on
your phone and connect it with the watch to update AGPS. Then, select a workout again. This
operation reduces the time spent searching for a signal and avoids search failure.
If, during the positioning process, the GPS signal icon continues to flicker, an open area can
offer you faster positioning for a better GPS signal, as nearby buildings may block and
weaken the signal, extending the positioning time and even causing positioning failure.
After successful positioning, the red status bar will turn to green color. The GPS signal shows
the current GPS signal strength.
AGPS is a kind of GPS satellite orbit information which helps the watch accelerate the GPS
positioning process.
Auto workout identification
A total of 8 workout types can be identified, namely walking, indoor walking, outdoor
running, treadmill, outdoor cycling, pool swimming, elliptical, and rowing machine.
Automatic workout identification is a process where the watch automatically determines the
workout type and records a single workout after related workout characteristics are compiled
with and your workout continues for a period.
You can set this in Settings > Workouts > Workout Detection.
Type: After you select a workout type, the automatic identification feature is enabled for the
workout.
Sensitivity: Higher sensitivity indicates a shorter recognition time. Recognition time is
prolonged if the sensitivity is low. Set as required.

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* Continuous workout status monitoring will greatly reduce the battery life. When no workout
is selected, the workout identification function is not enabled. If the watch detects an ongoing
workout, some data cannot be synchronized with the app.
Voice broadcast during workout
Voice broadcast is support when workout alerts or workout laps are triggered or when you
pause, continue, end a workout or go to the workout history. The broadcast content includes
workout data summary and operation reminders.
Go to Settings > Sound and Vibration > Voice Broadcast > Workout to enable this feature.
Workout history
When a workout ends, the workout record will automatically be saved to the Workout History
app. If you end the workout when the workout time is too short, the watch will ask you
whether to save it. Due to the limited storage space, it is recommended that you synchronize
the workout data to the app soon after completing a workout; otherwise, the workout data
may be overwritten.
Workout history on the watch
Workout history includes the workout data, workout trace (for workouts which support GPS),
lap/set data, workout goal completion, and other information.
When a workout ends, the screen will immediately jump to the workout history details page,
or you can view recent workout history details in the Activities app. The watch can save up to
100 recent workout records.
Personal Best
The best records from certain types of workouts will be saved, including longest distance,
longest workout time, and so on.
Workout history on the app
Workout history on the app shows a wider range of workout data. Dynamic route and sharing
features are also supported.
Open the Zepp app, tap in the upper right corner of the home page, and go to Workout
History.
Physical indicators for workouts
The watch provides a variety of physical indicators for workouts. You can use evaluation
scores as a reference for your workouts. These indicators can be viewed in workout records or
the Workout status app, including current training load, total recovery time, VO₂ Max, and
training effect.
You can find a detailed explanation of current training load, full recovery time, and VO₂ Max
in the Workout Status app.
TE
Training Effect (TE) is an indicator for measuring the effect of a workout on improving the
aerobic capacity. When you work out while wearing the watch, the TE score starting from 0.0
increases as the workout progresses. The TE score ranges from 0.0 to 5.0, and different score
ranges indicate different effects. A higher TE score indicates a greater workout intensity. It
signifies a higher body load, but a better TE. However, you should consider whether your

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body load is too high when the TE score reaches 5.0.
Aerobic TE Score
Effect on Improving Aerobic Capacity
0.0 – 0.9
This workout has no effect on improving aerobic capacity.
1.0-1.9
This workout helps improve endurance and is ideal for post-
workout recovery training.
2.0-2.9
This workout helps maintain aerobic capacity.
3.0-3.9
This workout significantly helps improve aerobic capacity.
4.0-4.9
This workout remarkably improves heart-lung ability and
aerobic capacity.
5.0
Post-workout recovery is required for non-athlete users.
Anaerobic TE Score
Effect on Improving Anaerobic Capacity
0.0 – 0.9
This workout has no effect on improving anaerobic capacity.
1.0-1.9
This workout has a slight effect on improving anaerobic
capacity.
2.0-2.9
This workout helps maintain anaerobic capacity.
3.0-3.9
This workout significantly helps improve anaerobic capacity.
4.0-4.9
This workout has a significant effect on improving anaerobic
capacity.
5.0
Post-workout recovery is required for non-athlete users.
The TE score is evaluated based on your profile, as well as your heart rate and speed during
your workout. A low TE score does not indicate a problem during your workout, but instead
signifies that the workout is too easy and has no significant effect on improving aerobic
capacity (for example, a low TE score for 1-hour of jogging).
How is it obtained?
Once a workout for which heart rate data is monitored ends, the watch displays the TE score
of the workout and provides related comments or suggestions. You can also review the TE
score of each workout record in the future.
Workout status
Workout status includes training load, full recovery time, and VO₂ Max. The device calculates
these metrics based on your personal information and data generated during the workout. As
you wear the device and data accumulates over time, we will gain a better insight into your
physical and workout data, and the accuracy of evaluation gradually improves.

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Maximum oxygen uptake (VO₂ Max)
VO₂ Max indicates the amount of oxygen consumed by the body during maximum-intensity
workouts, which is an important indicator of the body's aerobic capacity. As one of the most
important reference indicator for endurance athletes, high-level VO₂ Max is the prerequisite
for high-level aerobic capacity.
VO₂ Max is a relatively personal indicator, which has different reference standards for users
with different genders and in different age groups. The device evaluates your athletic capacity
based on your profile and the heart rate and speed during your workouts. Also, VO₂ Max
changes with your athletic capacity. However, everyone has a VO₂ Max value, which varies
by individual body conditions.
VO₂ Max values map to seven athletic ability levels: Novice, Elementary, Ordinary, Medium,
Good, Excellent, and Superior.
How to obtain the data:
1. Correctly enter your profile in the app.
2. Run outdoors for at least 10 minutes while wearing the watch and ensure that your heart
rate reaches 75% of your maximum heart rate.
How to view the data:
You can view the current VO₂ Max in the watch's workout status app. You can also view the
VO₂ Max history and variation trends in the app.
Training load
The training load score is calculated based on your Excess Post-Exercise Oxygen
Consumption (EPOC). A higher score indicates a longer workout time and a greater workout
intensity. The training load score is calculated as your total training load over the past 7 days,
which represents the burden brought to your body from the recent workouts.
There are three training load ranges: low, moderate, and high.
If the training load is low, it will not help much to improve your athletic ability. However, if
the training load is relatively high or too high, you may feel too tired, meaning it is not
conducive to effectively improving your ability and may also cause injury risks. If you want
to continuously improve your athletic ability within a tolerance range, it is recommended that
you keep the training load score within the moderate range.
The moderate range of the training load score depends on your recent and long-term workout
data, and will become increasingly accurate as you use it.
How to obtain training load:
After the workout mode is enabled on the device, you can obtain the training load of the
current workout once you reach the minimum training load level. The training load over the
past 7 days can be viewed in the workout status application of the watch.
How to view the training load:
The training load can be viewed in the workout status application of the watch. You can view
your historical training load and change trends in the app.
Total recovery time
Total recovery time is the recommended time for the complete recovery of the body. After
each workout, recovery suggestions will be offered based on the heart rate of the latest
workout to help you better recover and reasonably arrange your workout to avoid injury.
Full Recovery Period
Workout Suggestions

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0-18 hours
You have fully or nearly fully recovered, and you can do
slightly higher-intensity training.
19-35 hours
You can train as usual and you can prepare to strengthen
your regimen again.
36-53 hours
Appropriately reducing the intensity of your training will
allow you to gain workout benefits from your last training,
and you should do recovery workouts to relieve physical
fatigue.
54-96 hours
Proper rest will allow you to get the benefits of the workout
from your last high-intensity training.
Activities and Health
One-tap measurement
This device supports heart rate, blood oxygen, stress, and respiration rate monitoring. You can
quickly check the status of various health indicators by using the One-tap measuring feature.
The measurement data will be saved under each feature's data records.
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up or down on the screen to select and open the One-tap Measuring app, and then tap
to start measurement. Setting the One-tap Measuring app as a quick access app allows
you to easily perform one-tap measurements.
Sleep
Sleep quality has an important impact on human health.
When you are wearing the device while sleeping, it will automatically record sleep
information. The device can record night sleep and naps. The device identifies sleep based on
the sleep schedule. Sleep time that overlaps with the schedule of the day will be recorded as
main sleep of the day. If no schedule is set, sleep during 00:00 to 08:00 will be identified as
main sleep by default. Sleep that is more than 60 minutes apart from main sleep will be
recorded as naps. Sleep less than 20 minutes will not be recorded.
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up or down on the screen to select and open the Sleep app. In the Sleep app on the
watch, you can view night sleep duration, sleep stages, sleep score, naps, and other
information. More information can be viewed after synchronizing to the app. Setting the
Sleep app as a quick access app allows you to easily view the sleep status.
Sleep Schedule
In Sleep Schedule, you can set different bedtime and wake-up time for every day of the week.
The device will turn on the sleep mode, prompt you to go to bed, wake you up at the
scheduled time, and monitor your sleep based on the scheduled time period, helping you
develop good sleep habits.
Open the Sleep app, swipe down to the last page, go to sleep settings, and tap Sleep Schedule
to set a sleep schedule. When the phone and watch are connected, you can also open the Zepp

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app, click in the upper right corner of Home page > tap Sleep > Regularity >
Sleep Schedule to complete settings.
Assisted Sleep Monitoring
Open the Sleep app, swipe down to the last page, and go to sleep settings to enable assisted
sleep monitoring. If the system detects that you are wearing the device during sleep, it will
automatically record more sleep data, such as REM sleep stages.
Sleep Breathing Quality Monitoring
Open the Sleep app, swipe down to the last page, and go to sleep settings to enable sleep
breathing quality monitoring. If the system detects that you are wearing the device during
sleep, it will automatically monitor your breathing quality to help you better understand your
sleep status.
When the phone and watch are connected, the assisted sleep monitoring and sleep breathing
quality monitoring settings can also be accessed in the Zepp app under Profile > Amazfit GTR
4 > Health Monitoring>Sleep > Sleep breathing quality monitoring.
PAI
PAI is used to measure a person's physiological activity and reflect overall physical condition.
It is calculated based on a person's BMP, the intensity of daily activities, and physiological
data.
Wake up the watch, press the button on the watch face page to go to the app list, and swipe up
or down on the screen to select and open the PAI app. In the PAI app on the watch, you can
view information such as your PAI score in the past seven days and today's PAI score.
Synchronize the data to the app to view more information. Setting the PAI app as a quick
access app allows you to easily view your PAI score.
By maintaining a certain intensity of daily activities or workouts, you can obtain your PAI
score. According to the results of the HUNT Fitness Study*, maintaining a PAI above 100
helps reduce the risk of cardiovascular death and increase life expectancy. For more
information, open the Zepp app and go to > PAI > PAI Q&A.
* The HUNT Fitness Study is a sub-project of the HUNT study, led by Professor Ulrik
Wisloff at the School of Medicine, Norwegian University of Science and Technology. It has
lasted over 35 years and involved more than 230,000 participants.
Heart rate
Heart rate is an important indicator of physical condition. Highly-frequent heart rate
measurement helps capture more heart rate changes and provide a reference for a healthy
lifestyle. To ensure measurement accuracy, you need to wear the watch correctly according to
the tips, and ensure that the part next to your skin is clean and free of sunscreen smear.
Wake up the watch, press the button on the watch face page to go to the app list, and swipe up
or down on the screen to select and open the Heart Rate app. In the Heart Rate app on the
watch, you can view your most recently measured heart rate value, all-day heart rate curve,
resting heart rate, heart rate interval distribution and other information. Synchronize the data
to the app to view more information. Setting the Heart Rate app as a quick access app allows
you to easily measure your heart rate.
When the phone and watch are connected, the following heart rate settings can also be

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accessed in the Zepp app under Profile > Amazfit GTR 4 > Health Monitoring.
Manual heart rate measurement
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up or down on the screen to select and open the Heart Rate app, and then tap to
manually measure your heart rate. When the measurements are done, the device will stay on
the Heart Rate screen and continue to measure and update the data.
Auto heart rate monitoring
1. Open the Heart Rate app, swipe up to the last page, and go to Settings > Auto Heart Rate
Monitor to adjust the monitoring frequency. The watch automatically measures your heart rate
at the set frequency and records changes in heart rate throughout the day.
2. Heart rate changes are more intense when you are working out. Enable the activity
detection feature to allow the watch to automatically increase measuring frequency when it
detects an activity so that more heart rate changes can be recorded.
Heart rate alerts
In a resting state (except sleep), the device will notify you if your heart rate goes above or
below the limit for 10 minutes.
1. When the Auto Heart Rate Monitoring frequency is set to 1 minute, the heart rate alert
feature can be enabled.
2. In the settings for high and low heart rate alerts, the alert value can be adjusted or alerts can
be disabled.
Blood oxygen
Blood oxygen is an important physiological indicator of respiration and circulation.
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up or down on the screen to select and open the SpO2 app, where you can view your
most recently measured blood oxygen value and all-day blood oxygen status. Synchronize the
data to the app to view more information. Setting the SpO2 app as a quick access app allows
you to easily measure your blood oxygen.
When the phone and watch are connected, the following blood oxygen settings can also be
accessed in the Zepp app under Profile > Amazfit GTR 4 > Health Monitoring.
Manual blood oxygen measurement
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up or down on the screen to select and open the Blood Oxygen app, then tap to
manually measure your blood oxygen. When the measurements are done, the device will stay
on the Blood Oxygen screen and continue to measure and update the data.
Auto blood oxygen monitoring
Go to the Blood Oxygen app, swipe up to the last page and go to Settings page to enable Auto
Blood Oxygen Monitor. In a resting state, the watch will automatically measure your blood
oxygen and record changes in blood oxygen levels throughout the day.

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Low blood oxygen alerts
Go to the Blood Oxygen app, swipe up to the last page and go to Settings page to enable Low
blood O2 Alert, or can access it in Zepp APP > Profile > Amazfit GTR4 > Health
Monitoring > Blood Oxygen > Low blood O2 Alert. In a resting state (except sleep), the
device will notify you if your blood oxygen falls below the limit for 10 minutes.
1. After Auto Blood Oxygen Monitor is enabled, enable the Low blood oxygen alerts feature.
2. In the settings for low blood oxygen alerts, the alert value can be adjusted or alerts can be
disabled.
Precautions for blood oxygen measurement
1. Wear the watch a distance of one finger away from the carpal and remain still.
2. Wear the band tightly, with an appropriate sense of pressure.
3. Place your arm on a tabletop or a stationary surface, with the watch screen facing up.
4. Maintain still during measurement and focus on the measurement.
5. Factors such as hair, tattoo, shaking, low temperature, and incorrect wearing of the watch
may affect measurement results, and even lead to measurement failure.
6. The measurement range of the watch is 80%-100%. This feature is for reference only and
should not be used as a basis for medical diagnosis. If you feel unwell, please seek medical
advice.
Stress
The stress index is calculated based on changes in heart rate variability. It is a reference for
health status evaluation. You should rest more when the index is high.
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up and down to select and open the Stress app. In the Stress app on the watch, you can
view your most recently measured stress value, all-day stress status, stress interval
distribution, and pressure status over the last seven days. Synchronize the data to the app to
view more information. Setting the Stress app as a quick access app allows you to easily
measure your stress.
When the phone and watch are connected, the following stress settings can also be accessed
in the Zepp app under Profile > Amazfit GTR 4 > Health Monitoring.
Manual stress measurement
In the Stress app, tap to manually measure your stress. When the measurements are
done, the device will stay on the Stress screen and continue to measure and update the data.
Auto stress monitoring
Open the Stress app, swipe up to the last page, and go to stress settings to enable Auto Stress
Monitoring. This will automatically measure the stress every five minutes to show you stress
changes throughout the day.
Stress Relief Reminder
In a resting state (except sleep), the device will notify you if your stress level goes above the
limit for 10 minutes.
1. After Auto Stress Monitoring is enabled, enable the Stress Relief Reminder feature.
2. In stress settings, enable Stress Relief Reminder, and then you can receive reminders.

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Activity
Maintaining a certain amount of daily activity is very important for your physical health.
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up or down to select and open the Activity app. The daily activity is composed of three
main indicators: Activity Indicator (which can be set as steps or calories), fat burning, and
standing. In Activity on the watch, you can view the all-day activity distribution chart. Setting
the Activity app as a quick access app allows you to easily check the progress of your main
indicators.
The watch also automatically records other activity data, including resting consumption,
walking time, sitting time, Stair climbing, and distance, which can be viewed in the Activity
app.
Goal notifications
The watch displays a notification when any main indicator of the daily activity reaches the set
target value.
1. Open the Activity app, swipe up to the last page, and go to activity settings to enable Goal
Reach Notifications. When the phone and watch are connected, these settings can also be
accessed in the Zepp app under Profile > Amazfit GTR 4 > Notifications and Reminders >
Goal notifications.
2. In Activity settings, you can also set daily goals for steps and calories. While the phone is
connected, these settings can also be accessed in the Zepp app under Profile > More > My
Goals.
Stand Reminders
To reduce the harm caused by remaining sedentary, the watch encourages you to move and be
active every hour while you are awake. The daily goal is that you are active for 12 hours a
day.
While you are awake, if no activity detected for more than one minute during the first 50
minutes of an hour, the watch will remind you to move around. When you receive a stand
reminder, you can still achieve the standing goal of the current hour as long as you move
before the next hour arrives.
Open the Activity app, swipe up to the last page, and go to activity settings to enable Stand
Reminders. When the phone and watch are connected, these settings can also be accessed in
the Zepp app under Profile > Amazfit GTR 4 > Notifications and Reminders > Stand
Reminders.
Cycle Tracking
Tracking the menstrual cycles helps you understand your own physiological rhythms.
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up or down on the screen to select and open the Cycle Tracking app. In the Cycle
Tracking app on the watch, you can view information such as menstrual cycle records and
predictions. More information can be viewed after synchronizing the data to the app. Setting
the Cycle Tracking app as a quick access app allows you to easily view your menstrual cycle
state and records.
Before using the Cycle Tracking app, you need to enter the start time of your most recent
period, the duration of the period, and the duration of your menstrual cycle. You can also
enter this data on the Zepp app and synchronize it to the watch. You can also modify these
settings and data in the Zepp app when needed.
When the phone and watch are connected, the following settings can also be accessed in the