Apple Watch 3 Aluminum (38mm 4G) vs Xiaomi Amazfit T-Rex
Side by side comparison between Apple Watch 3 Aluminum vs Xiaomi Amazfit T-Rex smartwatches, differences, pros, cons and full specifications. What's the better?
,
1.5"
AMOLED
AMOLED
340x272
N/A
768MB
RAM
RAM
Dual-core
279
mAh
mAh
(Non removable)
vs
1.3"
AMOLED
AMOLED
360x360
N/A
512MB
RAM
RAM
Single-core
390
mAh
mAh
(Non removable)
What's the better smartwatch? Apple Watch 3 Aluminum (38mm 4G)
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!
13 Advantages 
6 Advantages | 14 Common items in both devices |
| AMOLED |
| 16 million |
| Capacitive |
| Multitouch |
| Accelerometer |
| Ambient light sensor |
| Heart rate |
| +7 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 | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| Model | Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex |
| Other model names | Apple Watch Series 3 GPS + Cellular (4G LTE), Apple Watch S3 | Mi Amazfit TRex |
| Country or region available |  (Global, International) | (Global, International) |
| Brand | Apple | Xiaomi |
| Release date | 9/22/2017 | 1/9/2020, Announced: 1/1/2020 |
| Depth | 11.4 millimeters (0.45 inches) | 13.5 millimeters (0.53 inches) |
| Size (width x height) | 33.3 x 38.6 millimeters (1.31 x 1.52 in) | 47.47 x 47.47 millimeters (1.87 x 1.87 in) |
| Weight | 29 grams (1.02 ounces) | 58 grams (2.03 ounces) |
| Build, materials | Aluminum body, glass front, plastic composite back | Plastic body, glass front |
| Protection against water and others | 5 ATM: 50 meters waterproof | 5 ATM: 50 meters waterproof |
📲 Display | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| Display type | AMOLED | AMOLED |
| Screen size | 1.5" inches | 1.3" inches |
| Screen-to-body ratio | ~55.1% (screen-to-body ratio) | ~24.2% (screen-to-body ratio) |
| Display resolution | 340x272 pixels | 360x360 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 290 PPI | 392 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Scratch-resistant glass | Gorilla Glass 3 |
| Refresh rate | feature not registered | 60Hz |
| Display features | feature not registered | Not supported |
🤖 Operating System | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| System version | WatchOS 4.0 | Proprietary OS |
| Firmware update | WatchOS 5.0 | feature not registered |
| User Interface | feature not registered | RTOS |
⚙️ Processor | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| Chipset | 32bit: Apple S3 (28nm) | 32bit |
| CPU | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A7 (Dual-core) | Single-core, 1 processor: Single-core |
| GPU graphical controller | PowerVR G6200 | feature not registered |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| RAM memory | 768MB LPDDR4 | 512MB LPDDR3 |
| Internal storage | 16GB (10GB available) | 4GB (2GB available) eMCP |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) e-SIM (Eletronic) | Not supported |
| Maximum Download / Upload | 150/50 Mbps | feature not registered |
| Network technology | 2G, 3G, 4G | feature not registered |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Not supported |
| Primary 2G network | GSM 850/900/1800/1900 | Not supported |
| Primary 3G network | A1889 model (Europe,Australia): UMTS 800/850/900/2100 A1860 model (USA,LATAM,Canada): UMTS 800/850/1700/1900 A1890 model (China): UMTS 2100 | Not supported |
| Primary 4G network | LTE Cat4 A1889 model (Europe,Australia): LTE (Bands 1,3,5,7,8,18,19,20,26) A1860 model (USA,LATAM,Canada): LTE (Bands 2,4,5,12,13,17,18,19,25,26) TD-LTE (Bands 41) A1890 model (China): LTE (Bands 1,3) TD-LTE (Bands 39,40,41) | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE | 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 | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| 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 | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| 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 | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| Loudspeaker | Supported | feature not registered |
| Active noise cancellation | Not supported | Not supported |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263 | feature not registered |
| Audio formats | MP3, WAV, eAAC+, FLAC | feature not registered |
🔌 Connectivity | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| USB | Not supported | Not supported |
| Audio output | Not supported | Not supported |
| TV output | Not supported | Not supported |
| Bluetooth | 4.2 + A2DP | 5.0 + A2DP/LE |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) | Not supported |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
| NFC | Supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| Sensors | Accelerometer Ambient light sensor Barometer Gyroscope Heart rate Pedometer | Accelerometer Ambient light sensor Compass Heart rate Pedometer SpO2 |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| Battery type | Li-Ion: lithium-ion (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 279 mAh | 390 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | Magnetic charging (dock) | Magnetic charging (dock) |
| Talk time autonomy | 18 hours | 20 hours |
| Standby | feature not registered | 480 hours (20 days) |
➕ Other features | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| Call control | Voice dialing | Not supported |
| Messaging | SMS, E-mail | SMS (T9), E-mail |
| Hands-free calling | Supported | Not supported |
| Video calling | Not supported | Not supported |
| Ringtones | Polyphonic and customized | feature not registered |
| Web browser | Not supported | Not supported |
| Antenna | Internal antenna | feature not registered |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Silver, Gold, Space Gray • Sport Band or Nike Sport Band • 1000 nits screen • 3D Touch display • Siri | • 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 |
☢️ Radiation rate | ||
| Apple Watch 3 Aluminum (38mm 4G) | Amazfit T-Rex | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.29W/kg (head), 0.15W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |