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Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820) vs Xiaomi Amazfit T-Rex Pro

Side by side comparison between Samsung Galaxy Watch Active 2 vs Xiaomi Amazfit T-Rex Pro smartwatches, differences, pros, cons and full specifications. What's the better?

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Compare Xiaomi Amazfit T-Rex Pro XSamsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)10Points
Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)
1.4"
AMOLED

360x360

N/A
MP

768MB
RAM

64bit Dual

340
mAh

(Non removable)

vs
Xiaomi Amazfit T-Rex Pro
1.3"
AMOLED

360x360

N/A
MP

512MB
RAM

32bit Single

390
mAh

(Non removable)

What's the better smartwatch? Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!


17 Common items in both devices
eMMC / eMCP
16 million
360x360 pixels
Capacitive
Multitouch
Accelerometer
Ambient Light sensor
+10 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differencesClear highlight

📱 Model features

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
ModelGalaxy Watch Active 2 (Aluminum 44mm SM-R820)Amazfit T-Rex Pro
Other model namesGalaxy Watch Active2 SM-R820 (Bluetooth+WiFi Aluminium)Mi Amazfit TRex Pro
Country or region available(Global, International)
(Global, International)
(Global, International)
(Global, International)
BrandSamsungXiaomi
Release date9/1/20193/23/2021, Announced: 3/5/2021
Depth10.9 millimeters (0.43 inches)13.5 millimeters (0.53 inches)
Size (width x height)44 x 44 millimeters (1.73 x 1.73 in)47.47 x 47.47 millimeters (1.87 x 1.87 in)
Weight30 grams (1.05 ounces)59 grams (2.07 ounces)
Build, materialsAluminum body, glass frontPlastic body, glass front
Protection against water and others5 ATM: 50 meters waterproof.
MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
10 ATM: 100 meters waterproof

🤖 Operating System

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
System versionTizen 4.0Proprietary OS
Firmware updatefeature not registeredfeature not registered
User Interfacefeature not registeredRTOS

⚙️ Processor

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
Chipset64bit - Samsung Exynos 9 Dual 9110 (10nm)32bit
CPUDual-Core, 1 processor:
1.15GHz Dual-Core ARM Cortex-A53
Single-Core, 1 processor:
Single-Core
GPU graphical controllerARM Mali-T720 MP1feature not registered
Performance (benchmark)feature not registeredfeature not registered

💽 Memory and storage

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
RAM memory768MB LPDDR3512MB LPDDR3
Internal storage4GB (1.39GB available)
eMMC
4GB (2GB available)
eMCP
External storageNot supportedNot supported

📲 Display

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
Display typeSuper AMOLEDAMOLED
Screen size1.4" inches1.3" inches
Screen-to-body ratio~32.7% (screen-to-body ratio)~24.2% (screen-to-body ratio)
Display resolution360x360 pixels (1:1)360x360 pixels
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)364 PPI392 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass DX+Gorilla Glass 3
Refresh ratefeature not registered60Hz
Display featuresNot supportedNot supported

📶 Mobile networks

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
Dual-SIMNot supportedNot supported
SIM cardNot supportedNot supported
Maximum download/uploadfeature not registeredfeature not registered
Network technologyfeature not registeredfeature not registered
Frequency, bandsExpand band detailsCollapse details
GSM MHz bandNot supportedNot supported
Primary 2G networkNot supportedNot supported
Primary 3G networkNot supportedNot supported
Primary 4G networkNot supportedNot supported
Primary 5G networkNot supportedNot supported
Primary data networkNot supportedNot supported
Secondary 2G networkNot supportedNot supported
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedNot supported

📷 Camera

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
Back camera (main camera)Not supportedNot supported
Main camera resolutionNot supportedNot supported
Video recording (primary)Not supportedNot supported
FlashNot supportedNot supported
Focal aperturefeature not registeredfeature not registered
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registeredfeature not registered
Pixel sizefeature not registeredfeature not registered
AutofocusNot supportedNot supported
Touch focusNot supportedNot supported
Image stabilizationNot supportedNot supported
ZoomNot supportedNot supported
Face/smile detectionNot supportedNot supported
BSI sensorNot supportedNot supported
HDRNot supportedNot supported
Camera extrasfeature not registeredfeature not registered

📸 Front camera

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
Front camera (secondary)Not supportedNot supported
Front camera resolutionNot supportedNot supported
Video recording (secondary)Not supportedNot supported
Front flashNot supportedNot supported
Focal aperturefeature not registeredfeature not registered
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registeredfeature not registered
Pixel sizefeature not registeredfeature not registered

🔉 Sound and multimedia

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
LoudspeakerSupportedfeature not registered
Active noise cancellationNot supportedNot supported
RadioNot supportedNot supported
TVNot supportedNot supported
Video formatsMP4feature not registered
Audio formatsMP3, WAV, WMA, OGG, eAAC+feature not registered

🔌 Connectivity

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
USBNot supportedNot supported
Audio outputNot supportedNot supported
TV outputNot supportedNot supported
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 b/g/n (2.4Ghz)Not supported
DLNANot supportedNot supported
GPSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDouA-GPS, GeoTagging, GLONASS, BeiDou
NFCSupportedNot supported
Infrared portNot supportedNot supported

🧭 Sensors

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
SensorsAccelerometer
Ambient Light sensor
Barometer
Heart rate
Pedometer
Accelerometer
Ambient Light sensor
Barometer
Compass
Heart rate
Pedometer
SpO2
Vibrating alertSupportedSupported

🔋 Battery

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
Battery typeLi-Ion: Lithium-Ion (Non removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity340 mAh390 mAh
Charger, watts Standard charging
Qi wireless charging
Standard charging
Magnetic charging (dock)
Talk time autonomy60 hours (2.5 days)432 hours (18 days)
Standbyfeature not registered432 hours (18 days)

➕ Other features

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
Call controlVoice dialing, Voice recorder, Voice commandsNot supported
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), E-mail
Hands-free callingSupportedNot supported
Video callingNot supportedNot supported
RingtonesPolyphonic and customizedfeature not registered
Web browserNot supportedNot supported
AntennaInternal antennafeature not registered
Qwerty physical keyboardNot supportedNot supported
Miscellaneous- Colors: Black, Silver, Pink Gold
- Bands: 20mm
- Always-on display
- Samsung Pay
- Colors: Black, Gray, Blue
- Watch band: 22mm
- BioTracker PPG
- 100 sports mode
- AppZepp app
- Compatible with Android 5.0/iOS 10 and above

☢️ Radiation rate

Samsung Galaxy Watch Active 2 (Aluminum 44mm SM-R820)Xiaomi Amazfit T-Rex Pro
SAR 1.6W/kg (USA, Mexico, etc.)0.17W/kg (head), 0.16W/kg (body)feature not registered
SAR 2W/kg (Europe, UK, etc.)0.057W/kg (head), 0.153W/kg (body)feature not registered
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