Xiaomi Amazfit T-Rex vs Samsung Galaxy Watch Active 2 (Aluminum 40mm SM-R830)
Side by side comparison between Xiaomi Amazfit T-Rex vs Samsung Galaxy Watch Active 2 smartwatches, differences, pros, cons and full specifications. What's the better?
,
1.3"
AMOLED
AMOLED
360x360
N/A
512MB
RAM
RAM
Single-core
390
mAh
mAh
(Non removable)
vs
1.2"
AMOLED
AMOLED
360x360
N/A
768MB
RAM
RAM
Dual-core
247
mAh
mAh
(Non removable)
What's the better smartwatch? Samsung Galaxy Watch Active 2 (Aluminum 40mm SM-R830)
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!
5 Advantages 
12 Advantages | 16 Common items in both devices |
| 16 million |
| 360x360 pixels |
| Capacitive |
| Multitouch |
| Accelerometer |
| Ambient light sensor |
| Heart rate |
| +9 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Change model | ||
| Model | Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) |
| Other model names | Mi Amazfit TRex | Galaxy Watch Active2 SM-R830 (Bluetooth+WiFi Aluminium) |
| Country or region available |  (Global, International) | (Global, International) |
| Brand | Xiaomi | Samsung |
| Release date | 1/9/2020, Announced: 1/1/2020 | 9/1/2019, Announced: 8/5/2019 |
| Depth | 13.5 millimeters (0.53 inches) | 10.9 millimeters (0.43 inches) |
| Size (width x height) | 47.47 x 47.47 millimeters (1.87 x 1.87 in) | 40 x 40 millimeters (1.57 x 1.57 in) |
| Weight | 58 grams (2.03 ounces) | 26 grams (.91 ounces) |
| Build, materials | Plastic body, glass front | Aluminum body, glass front |
| Protection against water and others | 5 ATM: 50 meters waterproof | 5 ATM: 50 meters waterproof. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
📲 Display | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Display type | AMOLED | Super AMOLED |
| Screen size | 1.3" inches | 1.2" inches |
| Screen-to-body ratio | ~24.2% (screen-to-body ratio) | ~29% (screen-to-body ratio) |
| Display resolution | 360x360 pixels | 360x360 pixels (1:1) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 392 PPI | 424 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Gorilla Glass DX+ |
| Refresh rate | 60Hz | feature not registered |
| Display features | Not supported | Not supported |
🤖 Operating System | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| System version | Proprietary OS | Tizen 4.0 |
| Firmware update | feature not registered | feature not registered |
| User Interface | RTOS | feature not registered |
⚙️ Processor | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Chipset | 32bit | 64bit: Samsung Exynos 9110 (10nm) |
| CPU | Single-core, 1 processor: Single-core | Dual-core, 1 processor: 2x 1.15GHz ARM Cortex-A53 (Dual-core) |
| GPU graphical controller | feature not registered | ARM Mali-T720 MP1 (667MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| RAM memory | 512MB LPDDR3 | 768MB LPDDR4 |
| Internal storage | 4GB (2GB available) eMCP | 4GB (1.39GB available) eMMC 5.1 |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | Not supported | 1 slot (Single-SIM) Not supported |
| Maximum Download / Upload | feature not registered | feature not registered |
| Network technology | feature not registered | feature not registered |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Not supported | Not supported |
| Primary 2G network | Not supported | Not supported |
| Primary 3G network | Not supported | Not supported |
| Primary 4G network | Not supported | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | Not supported | Not supported |
| Secondary 2G network | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
📷 Camera | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Back camera (main camera) | Not supported | Not supported |
| Main camera resolution | Not supported | Not supported |
| Video recording (primary) | Not supported | Not supported |
| Flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | Not supported | Not supported |
| Touch focus | Not supported | Not supported |
| Image stabilization | Not supported | Not supported |
| Zoom | Not supported | Not supported |
| Face/smile detection | Not supported | Not supported |
| BSI sensor | Not supported | Not supported |
| HDR | Not supported | Not supported |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Front camera (secondary) | Not supported | Not supported |
| Front camera resolution | Not supported | Not supported |
| Video recording (secondary) | Not supported | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
🔉 Sound and multimedia | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Loudspeaker | feature not registered | Supported |
| Active noise cancellation | Not supported | 1 microphone |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | feature not registered | MP4 |
| Audio formats | feature not registered | MP3, WAV, WMA, OGG, eAAC+ |
🔌 Connectivity | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| USB | Not supported | Not supported |
| Audio output | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 5.0 + A2DP/LE |
| WiFi | Not supported | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Not supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Sensors | Accelerometer Ambient light sensor Compass Heart rate Pedometer SpO2 | Accelerometer Ambient light sensor Barometer Heart rate Pedometer |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 390 mAh | 247 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | Magnetic charging (dock) | Qi wireless charging |
| Talk time autonomy | 20 hours | 43 hours (1.8 days) |
| Standby | 480 hours (20 days) | feature not registered |
➕ Other features | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| Call control | Not supported | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), E-mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Not supported | Supported |
| Video calling | Not supported | Not supported |
| Ringtones | feature not registered | Polyphonic and customized |
| Web browser | Not supported | Not supported |
| Antenna | feature not registered | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Black, Gray, Camouflage, Army green, Khaki • Watch band: 22mm • BioTracker PPG • 14 sports mode • AppZepp app • Compatible with Android 5.0/iOS 10 and above | • Colors: Black, Silver, Pink Gold • Bands: 20mm • Always-on display • Samsung Pay |
☢️ Radiation rate | ||
| Amazfit T-Rex | Galaxy Watch Active 2 (Aluminum 40mm SM-R830) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.08W/kg (head), 0.11W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.041W/kg (head), 0.101W/kg (body) |