Xiaomi Amazfit T-Rex Pro vs Samsung Galaxy Watch (46mm SM-R805U)
Side by side comparison between Xiaomi Amazfit T-Rex Pro vs Samsung Galaxy Watch 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
1.3"
AMOLED
AMOLED
360x360
N/A
1.5GB
RAM
RAM
Dual-core
472
mAh
mAh
(Non removable)
What's the better smartwatch? Samsung Galaxy Watch (46mm SM-R805U)
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!
6 Advantages 
13 Advantages | 17 Common items in both devices |
| 16 million |
| 360x360 pixels |
| 392 PPI |
| 1.3" |
| Capacitive |
| Multitouch |
| Accelerometer |
| +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 differences Clear highlight📱 Model features | ||
| Amazfit T-Rex Pro | Galaxy Watch (46mm SM-R805U) | |
| Change model | ||
| Model | Amazfit T-Rex Pro | Galaxy Watch (46mm SM-R805U) |
| Other model names | Mi Amazfit TRex Pro | Galaxy Watch 46mm (4G LTE) SM-R805UZSAXAR, Samsung Galileo |
| Country or region available |  (Global, International) |  USA |
| Brand | Xiaomi | Samsung |
| Release date | 3/23/2021, Announced: 3/5/2021 | 8/9/2018 |
| Depth | 13.5 millimeters (0.53 inches) | 13 millimeters (0.51 inches) |
| Size (width x height) | 47.47 x 47.47 millimeters (1.87 x 1.87 in) | 46 x 49 millimeters (1.81 x 1.93 in) |
| Weight | 59 grams (2.07 ounces) | 63 grams (2.21 ounces) |
| Build, materials | Plastic body, glass front | Stainless steel body, glass front |
| Protection against water and others | 10 ATM: 100 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 Pro | Galaxy Watch (46mm SM-R805U) | |
| Display type | AMOLED | Super AMOLED |
| Screen size | 1.3" inches | 1.3" inches |
| Screen-to-body ratio | ~24.2% (screen-to-body ratio) | ~24.2% (screen-to-body ratio) |
| Display resolution | 360x360 pixels | 360x360 pixels (1:1) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 392 PPI | 392 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 Pro | Galaxy Watch (46mm SM-R805U) | |
| 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 Pro | Galaxy Watch (46mm SM-R805U) | |
| 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 Pro | Galaxy Watch (46mm SM-R805U) | |
| RAM memory | 512MB LPDDR3 | 1.5GB LPDDR4 |
| Internal storage | 4GB (2GB available) eMCP | 4GB (1.5GB available) eMMC 5.1 |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Amazfit T-Rex Pro | Galaxy Watch (46mm SM-R805U) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | Not supported | 1 slot (Single-SIM) e-SIM (Eletronic) |
| Maximum Download / Upload | feature not registered | 10 Mbps |
| Network technology | feature not registered | 3G, 4G |
| 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 | UMTS 850/1700/1900 |
| Primary 4G network | Not supported | LTE (Bands 2,4,5,12,13,25,26,66) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | Not supported | UMTS, HSDPA, HSUPA, HSPA+, LTE |
| 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 Pro | Galaxy Watch (46mm SM-R805U) | |
| 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 Pro | Galaxy Watch (46mm SM-R805U) | |
| 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 Pro | Galaxy Watch (46mm SM-R805U) | |
| 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 Pro | Galaxy Watch (46mm SM-R805U) | |
| USB | Not supported | Not supported |
| Audio output | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 4.2 + A2DP |
| WiFi | Not supported | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging, GLONASS |
| NFC | Not supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Amazfit T-Rex Pro | Galaxy Watch (46mm SM-R805U) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Heart rate Pedometer SpO2 | Accelerometer Ambient light sensor Barometer Gyroscope Heart rate Pedometer |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Amazfit T-Rex Pro | Galaxy Watch (46mm SM-R805U) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 390 mAh | 472 mAh |
| Charger, watts | Wired charging | 3.5W (5V/7A) Wired charging |
| Inductive / wireless charging | Magnetic charging (dock) | Qi wireless charging |
| Talk time autonomy | 432 hours (18 days) | feature not registered |
| Standby | 432 hours (18 days) | 72 hours (3 days) |
➕ Other features | ||
| Amazfit T-Rex Pro | Galaxy Watch (46mm SM-R805U) | |
| 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, Blue • Watch band: 22mm • BioTracker PPG • 100 sports mode • AppZepp app • Compatible with Android 5.0/iOS 10 and above | • Colors: Silver • Straps: Onyx Black, Deep Ocean Blue, Basalt Grey • Compatible with standard 22mm straps • Always-on display • Rotating bezel • Samsung Pay • Compatible with Sprint, T-Mobile and Verizon carriers |
☢️ Radiation rate | ||
| Amazfit T-Rex Pro | Galaxy Watch (46mm SM-R805U) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 1.244W/kg (head), 1.733W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |