In depth comparison and review of Amazfit T-Rex 2 and Fitbit Versa 4. 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 | Fitbit Versa 4 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | Zepp OS | - |
| Supported Host Device OS | iOS 12 or later, Android 7.0 (Nougat) or later | Android 10 or later, iOS 13.4 or later |
| Activity/Sport | Multisport | - |
| Wearing Style | Watch style | Watch style |
| Audio Input | - | Microphone |
| Audio Output | - | Speaker |
| Width | 47.1 mm | 40.5 mm |
| Height | 47.1 mm | 40.5 mm |
| Depth | 13.65 mm | 11.2 mm |
| Weight | 66.5 g | - |
| Body Material | Polymer | - |
| Protection | Shockproof, water-resistant, salt fog protection, freezeproof, heat-resistant | Water-resistant |
| Clock Display | Yes | Yes |
| FEATURES | Amazfit T-Rex 2 | Fitbit Versa 4 |
|---|
| Sensors | Accelerometer, ambient light sensor, digital compass, gyro sensor, geomagnetic sensor, barometric altimeter, BioTracker PPG 3.0 biometric sensor | Ambient light sensor, altimeter, SpO2 sensor, 3-axis accelerometer, optical heart sensor, vibration motor |
|---|---|---|
| Tracking Data | Distance, calories burned, sleep activity, heart rate, blood oxygen saturation, sleep stages, stress level, menstrual cycle | Distance, calories burned, activity, sleep activity, heart rate, steps taken, pace, stress level, menstrual cycle, Resting Heart Rate (RHR), breathing rate, sleep quality score |
| Modes | 150+ sports modes | 40+ sports 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 | Find phone function, VO2 max, Heart Rate Variability (HRV) monitoring, HR zones, automatic exercise recognition, smart Wake-Up, Active Zone Minutes, guided breathing session, Always-on display, Sleep Score, Sleep Profile, Stress Management Score, Daily Readiness Score |
| Notifications | Missed calls, calendar, incoming calls, applications | SMS, incoming calls, applications, high and low heart rate |
| Vibrating Alert | Yes | Yes |
| Feedback Type | Vibration alert, visual interface | Audio alert, vibration alert, visual interface |
| Navigation (GPS) | GPS receiver | GPS/GLONASS receiver |
| Payment Technology | - | FitBit Pay |
| Internet of Things (IoT) Compatible | - | Yes |
| IoT Intelligent Assistant | - | Alexa built-in |
| CONNECTIVITY | Amazfit T-Rex 2 | Fitbit Versa 4 |
|---|
| Wireless Interface | Bluetooth 5.0 BLE | NFC, Bluetooth 5.0 |
|---|
| DISPLAY | Amazfit T-Rex 2 | Fitbit Versa 4 |
|---|
| Type | AMOLED - colour | Colour |
|---|---|---|
| Resolution | 454 x 454 pixels | - |
| Screen Size | 1.39" | - |
| Pixel Density | 326 ppi | - |
| Always On Display (AOD) | Yes | Yes |
| INPUT DEVICE | Amazfit T-Rex 2 | Fitbit Versa 4 |
|---|
| Type | Touch sensitive screen, touch buttons | Touch sensitive screen |
|---|
| CASE | Amazfit T-Rex 2 | Fitbit Versa 4 |
|---|
| Case Size | - | 40 mm |
|---|---|---|
| Case Shape | Round | Square |
| Case Details | Ember black | Wild green | Desert khaki | Astro black and gold | Copper rose | Graphite | Platinum |
| BAND | Amazfit T-Rex 2 | Fitbit Versa 4 |
|---|
| Band Type | Strap | Band |
|---|---|---|
| Band Size | - | S/L |
| Fits Wrist with Circumference | 140-205 mm | Up to 209 mm |
| Changeable | - | Yes |
| Clasp Type | Buckle | Pin-and-tuck |
| Band Material | Silicone | - |
| Band Colour | Ember black | Wild green | Desert khaki | Pink sand | Black | Waterfall blue |
| BATTERY | Amazfit T-Rex 2 | Fitbit Versa 4 |
|---|
| Technology | - | Lithium polymer |
|---|---|---|
| Capacity | 500 mAh | - |
| Battery Life | 24 day(s) | 6 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 6 days GPS mode - up to 12 hour(s) |
| Rechargeable Battery | Yes | Yes |
| Recharge Time | 2 hour(s) | 2 hour(s) |
| MISCELLANEOUS | Amazfit T-Rex 2 | Fitbit Versa 4 |
|---|
| Included Accessories | Magnetic charging dock | Charging cable, 6-month Fitbit Premium membership, wristband (129 - 175 mm), wristband (158 - 209 mm) |
|---|---|---|
| Preloaded Software | Zepp App | Google Maps, FitBit Pay, Google Wallet |
| Compliant Standards | MIL-STD 810G | - |
| Max Depth of Water Resistance | 100 m | 50 m |
| Max Operating Temperature | - | 45 °C |
| Min Operating Temperature | - | -10 °C |
| Warranty | 1-year warranty | 2-year warranty |
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