Xiaomi Redmi Watch 4

Design

Screen Size The size of the screen (measured diagonally). 1.75"
Display Type The type of technology used in the display. AMOLED
Dustproof and water-resistant
ATM Rating 5 ATM
(IP) rating Unknown
Branded damage-resistant glass
Gorilla Glass version Unknown
Pixel density 302ppi
Sweat resistance
Watch band is replaceable
Resolution 390 x 450px
Always-On Display
Thickness 10.5mm
Touch screen
Waterproof depth rating 50m
Weight 31.5g
Height 47.58mm
Width 41.1mm
Sapphire Glass Display

Sensor

Accelerometer
Altimeter
Ambient light sensor
Barometer
Cadence Sensor
Compass
Electrocardiogram (ECG)
GPS
Gyroscope
Heart Rate Monitor
Oxygen saturation (SpO2)
Temperature Sensor
Thermometer

Activity tracking

Tracks your sleep
Tracks distance
Tracks steps taken
Measures pace
Provides sleep reports
Detects activities automatically
Route tracker
Tracks elevation
Exercise tagging
Stroke counter for swimming
Tracks calorie intake
Designed for golf
Designed for diving

Connectivity

Compatible with iOS YES
Compatible with Android It is compatible with a range of Android devices such as smartphones and tablets. YES
Bluetooth version Bluetooth is a wireless technology standard that allows data transfers between devices placed in close proximity, using short-wavelength, ultra-high frequency radio waves. Newer versions provide faster data transfers. 5.3
Supports ANT+ ANT+ is a wireless protocol similar to Bluetooth Smart, and is very power efficient. It is mainly used for fitness monitoring devices such as heart rate monitors and cadence sensors to connect to other devices (e.g., sports watches, smartphones, and cycling computers). YES
NFC NFC (near-field communication) allows a device to perform simple wireless transactions, such as mobile payments. Note: this feature may not be available in all markets.
Has a cellular module Devices that use cellular technology can connect to mobile networks. Cellular networks have much wider signal coverage than Wi-Fi.
Positioning GPS, GLONASS, GALILEO, BDS, QZSS

Battery

Battery life With a longer battery life, you don’t have to worry about charging the device as often. 20 days
Battery power Battery power, or battery capacity, represents the amount of electrical energy that a battery can store. More battery power can be an indication of longer battery life. 470mAh
Has wireless charging NO
Has a solar power battery A solar battery takes its energy from light, and stores it in a self-recharging battery which never needs to be changed. NO

Features

HRV tracking Heart rate variability (HRV) tracking measures fluctuations in the time between heart beats. YES
Shows readiness level This is based on various information, such as your previous workout, sleep quality, and stress levels.
Can be used to answer calls The device has a speaker and microphone that allow you to answer calls made to your smartphone.
Has fast/slow heart rate notifications It can notify you when your resting heart rate is above or below the normal range. YES
Locates your watch NO
Locates your phone The device has a feature that allows you to find your smartphone if you have misplaced it. YES
Has call control The device alerts you to incoming calls on your smartphone, and allows you extra control such as muting or rejecting the call.
Has notifications If you get a notification such as a call or message, the device will vibrate on your wrist or make a noise to alert you.
ECG technology ECG stands for electrocardiogram and measures the electrical activity of the heartbeat, which is a more in-depth reading of heart health than blood pressure alone.
Has silent alarm The device can wake you using vibration, so as not to disturb anyone else sleeping in the room.
Has a stopwatch With a stopwatch you can time yourself.
Has smart alarm It determines when you are in a light state of sleep and wakes you up within a set period of time before your alarm.
Has vibrating alerts Vibrating alerts have a variety of uses, such as interval training.
Has voice commands You can use your voice to control key functions of the device and you can easily access your device without pushing any button.
Acquires GPS faster It can periodically download data on the future position of GPS satellites.

App & Software

Provides activity reports Your activity data is analysed to give you reports, available to view through the app or website.
Inactivity alerts
Counts how many calories you've burned This is useful if you are on a strict training diet or if you are trying to lose weight. It can also help to boost your motivation. NO
Goal setting Allows you to set your own goals, such as reaching 10,000 steps in a single day.
Has achievements You are awarded achievements for reaching goals, helping to encourage you and keep you motivated.
Free app You can download the app for free, from platforms such as Google Play or the App Store.
Exercise diary
Has coaching The app can determine the best way for you to progress in your exercise, and offers coaching advice.
Has temperature tracking You can keep track of your temperature. Temperature data can be used to help work out the most likely time you will be ovulating. NO
Supports routes You can create or find existing routes to sync to the app.
Has period notifications You get a notification when you are due to get your period.
Predicts ovulation The app uses your menstruation data to predict the date of your ovulation, which usually lasts 24-48 hours.
Supports widgets You can add widgets to the home screen. This allows you to have more flexibility and to see information at a glance, without going into the app.
Can be personalised You can personalize the appearance of the app - for example, choosing a different theme or colors.
Tracks water intake You can use it to log the water you drink throughout the day.
Has weight tracking You can input your weight data, making it easier to track changes.
Tracks BMI BMI (body mass index) is a measurement of body shape determined by the person’s height and weight.

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