In depth comparison and review of Samsung Galaxy Watch4 and Amazfit T-Rex 2. Compare sizes, functions, displays, batteries and other important specifications and features to easily choose the right smartwatch for you. Our goal is to help you uncover differences between the products and find the watch that will best fit your needs.
| GENERAL | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | Wear OS by Samsung | Zepp OS |
| Supported Host Device OS | Android 6.0 (Marshmallow) or later | iOS 12 or later, Android 7.0 (Nougat) or later |
| Activity/Sport | - | Multisport |
| Wearing Style | Watch style | Watch style |
| Width | 39.3 mm | 47.1 mm |
| Height | 40.4 mm | 47.1 mm |
| Depth | 9.7 mm | 13.65 mm |
| Weight | 25.9 g | 66.5 g |
| Body Material | Aluminium | Polymer |
| Protection | Waterproof | Shockproof, water-resistant, salt fog protection, freezeproof, heat-resistant |
| Clock Display | Yes | Yes |
| FEATURES | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Sensors | Accelerometer, ambient light sensor, barometer, gyro sensor, bioimpedance sensor, electromagnetic compass, optical heart sensor, electrical heart sensor | Accelerometer, ambient light sensor, digital compass, gyro sensor, geomagnetic sensor, barometric altimeter, BioTracker PPG 3.0 biometric sensor |
|---|---|---|
| Tracking Data | Distance, calories burned, activity, sleep activity, heart rate, steps taken, blood oxygen saturation, body composition, ECG, REM phases | Distance, calories burned, sleep activity, heart rate, blood oxygen saturation, sleep stages, stress level, menstrual cycle |
| Modes | - | 150+ sports modes |
| Goal Setting | Yes | Yes |
| Features | Find phone function, VO2 max, automatic exercise recognition, personalised coaching | Camera remote control, find phone function, flashlight, alarm, realtime location tracking, weather information, event reminders, PAI Health Assessment System, pomodoro timer, stopwatch timer, PeakBeats workout status algorithm, OxygenBeats algorithm, ExerSense algorithm, SomnusCare, Dual-band navigation |
| Notifications | Calendar, SMS, social apps, incoming calls | Missed calls, calendar, incoming calls, applications |
| Vibrating Alert | Yes | Yes |
| Feedback Type | Vibration alert, visual interface | Vibration alert, visual interface |
| Digital Player | MP3, WAV, AAC, AMR, M4A, OGG, 3GA, AWB, OGA | - |
| Navigation (GPS) | GPS/GLONASS/Galileo/BeiDou receiver | GPS receiver |
| CELLULAR | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Technology | WCDMA (UMTS) | - |
|---|---|---|
| Mobile Broadband Generation | 4G | - |
| SIM Card Type | Electronic SIM card (e-SIM) | - |
| CONNECTIVITY | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Wireless Interface | NFC, IEEE 802.11a/b/g/n, Bluetooth 5.0 | Bluetooth 5.0 BLE |
|---|---|---|
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | - |
| DISPLAY | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Type | Super AMOLED - colour | AMOLED - colour |
|---|---|---|
| Resolution | 396 x 396 pixels | 454 x 454 pixels |
| Screen Size | 1.19" | 1.39" |
| Aspect Ratio | Full circle | - |
| Pixel Density | 330 ppi | 326 ppi |
| Colour Depth | 24-bit (16.7 million colours) | - |
| Screen Protection | Corning Gorilla Glass DX+ (scratch resistant glass) | - |
| Always On Display (AOD) | Yes | Yes |
| INPUT DEVICE | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Type | Touch sensitive screen, push buttons | Touch sensitive screen, touch buttons |
|---|
| CASE | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Case Size | 40 mm | - |
|---|---|---|
| Case Shape | Round | Round |
| Case Details | Pink gold | Black | Silver | Ember black | Wild green | Desert khaki | Astro black and gold |
| BAND | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Band Type | Sport band | Strap |
|---|---|---|
| Fits Wrist with Circumference | - | 140-205 mm |
| Changeable | Yes | - |
| Clasp Type | Buckle | Buckle |
| Band Material | - | Silicone |
| Band Colour | Pink | Black | White | Ember black | Wild green | Desert khaki |
| STORAGE | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Storage Capacity | 16 GB | - |
|---|---|---|
| User Memory | 7.6 GB | - |
| RAM | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| RAM Size | 1.5 GB | - |
|---|
| CPU | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Manufacturer | Samsung | - |
|---|---|---|
| CPU Type | Exynos W920 | - |
| Clock Speed | 1.18 GHz | - |
| BATTERY | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Capacity | 247 mAh | 500 mAh |
|---|---|---|
| Battery Life | 40 hours | 24 day(s) |
| Battery Life Details | - | Typical usage - up to 24 days Battery safe mode - up to 45 days Heavy usage - up to 10 days Accurate mode (with GPS) - up to 26 hour(s) Balanced mode (with GPS) - up to 50 hour(s) Power saving mode (with GPS) - up to 58 hour(s) Ultra-low temperature (with GPS) - up to 10 hour(s) Ultra-low temperature (without GPS) - up to 9 days |
| Rechargeable Battery | Yes | Yes |
| Recharge Time | - | 2 hour(s) |
| Wireless Charging | Yes | - |
| Wireless Charging Standards | WPC, Wireless PowerShare | - |
| MISCELLANEOUS | Samsung Galaxy Watch4 | Amazfit T-Rex 2 |
|---|
| Included Accessories | Wireless charging dock | Magnetic charging dock |
|---|---|---|
| Preloaded Software | - | Zepp App |
| Compliant Standards | MIL-STD 810G, IP68 | MIL-STD 810G |
| SAR Value | 0.729 W/kg (head), 2.594 W/kg (limb) | - |
| Max Depth of Water Resistance | 50 m | 100 m |
| Manufacturer Model Number | SM-R865F | - |
| Warranty | 2-year warranty | 1-year warranty |
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