In depth comparison and review of Amazfit T-Rex 2 and OPPO Watch Free. 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 | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | Zepp OS | - |
| Supported Host Device OS | iOS 12 or later, Android 7.0 (Nougat) or later | iOS 10 or later, Android 6.0 (Marshmallow) or later |
| Activity/Sport | Multisport | Indoor running, indoor walking, elliptical, 5-min workouts, fat burn running, outdoor walking, outdoor running, indoor rowing, endurance running, interval running, jogging |
| Wearing Style | Watch style | Watch style |
| Width | 47.1 mm | - |
| Height | 47.1 mm | - |
| Depth | 13.65 mm | - |
| Weight | 66.5 g | - |
| Body Details | - | Case only: 20.9 g |
| Body Material | Polymer | Glass fibre reinforced polycarbonate, PA + GF bottom case |
| Protection | Shockproof, water-resistant, salt fog protection, freezeproof, heat-resistant | Water-resistant |
| Colours | - | Black |
| Clock Display | Yes | Yes |
| FEATURES | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Sensors | Accelerometer, ambient light sensor, digital compass, gyro sensor, geomagnetic sensor, barometric altimeter, BioTracker PPG 3.0 biometric sensor | Ambient light sensor, SpO2 sensor, 6-axis accelerometer, optical heart sensor, blood oxygen sensor, gyroscope |
|---|---|---|
| Tracking Data | Distance, calories burned, sleep activity, heart rate, blood oxygen saturation, sleep stages, stress level, menstrual cycle | Distance, time, calories burned, activity, sleep activity, heart rate, steps taken, blood oxygen saturation, heart rate variability, snoring |
| Modes | 150+ sports modes | 100+ Workout modes |
| Goal Setting | Yes | Yes |
| Features | 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 | Call handling, find phone function, inactivity alert, alarm, timer, music playback control, weather information, AI smart watch face, sleep disturbance analysis |
| Notifications | Missed calls, calendar, incoming calls, applications | SMS, incoming calls |
| Vibrating Alert | Yes | Yes |
| Feedback Type | Vibration alert, visual interface | Vibration alert, visual interface |
| Navigation (GPS) | GPS receiver | - |
| CONNECTIVITY | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Wireless Interface | Bluetooth 5.0 BLE | Bluetooth 5.0 BLE |
|---|
| DISPLAY | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Type | AMOLED - colour | AMOLED - colour |
|---|---|---|
| Resolution | 454 x 454 pixels | 456 x 280 pixels |
| Screen Size | 1.39" | 1.64" |
| Pixel Density | 326 ppi | 326 ppi |
| Colour Depth | - | 24-bit (16.7 million colours) |
| Screen Protection | - | 2.5D curved glass |
| Always On Display (AOD) | Yes | - |
| INPUT DEVICE | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Type | Touch sensitive screen, touch buttons | Touch sensitive screen |
|---|
| CASE | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Case Shape | Round | Rectangular |
|---|---|---|
| Case Details | Ember black | Wild green | Desert khaki | Astro black and gold | - |
| BAND | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Band Type | Strap | Strap |
|---|---|---|
| Band Width | - | 19 mm |
| Fits Wrist with Circumference | 140-205 mm | 130-205 mm |
| Changeable | - | Yes |
| Clasp Type | Buckle | Buckle |
| Band Material | Silicone | Silicone |
| Band Colour | Ember black | Wild green | Desert khaki | - |
| BATTERY | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Technology | - | Lithium Ion |
|---|---|---|
| Capacity | 500 mAh | 235 mAh |
| Battery Life | 24 day(s) | 14 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 |
Typical usage - up to 14 days |
| Rechargeable Battery | Yes | Yes |
| Recharge Time | 2 hour(s) | - |
| MISCELLANEOUS | Amazfit T-Rex 2 | OPPO Watch Free |
|---|
| Included Accessories | Magnetic charging dock | Magnetic charging dock |
|---|---|---|
| Preloaded Software | Zepp App | - |
| Compliant Standards | MIL-STD 810G | - |
| Max Depth of Water Resistance | 100 m | 50 m |
| Manufacturer Model Number | - | OWWE201 |
| Warranty | 1-year warranty | 2-year warranty |
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