In depth comparison and review of ASUS ZenWatch 3 WI503Q 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 | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | Android Wear | Zepp OS |
| Supported Host Device OS | Android 4.3 (Jelly Bean) or later, iOS 8.2 or later | iOS 12 or later, Android 7.0 (Nougat) or later |
| Activity/Sport | - | Multisport |
| Wearing Style | Watch style | Watch style |
| Audio Input | Microphone | - |
| Audio Output | Speaker | - |
| Width | - | 47.1 mm |
| Height | - | 47.1 mm |
| Depth | - | 13.65 mm |
| Weight | - | 66.5 g |
| Body Details | Main unit: 60 g Wrist strap: 20 g |
- |
| Body Material | 316L stainless steel alloy | Polymer |
| Protection | Waterproof | Shockproof, water-resistant, salt fog protection, freezeproof, heat-resistant |
| Clock Display | Yes | Yes |
| FEATURES | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Sensors | Ambient light sensor, 6-axis accelerometer | Accelerometer, ambient light sensor, digital compass, gyro sensor, geomagnetic sensor, barometric altimeter, BioTracker PPG 3.0 biometric sensor |
|---|---|---|
| Tracking Data | Distance, calories burned, activity, steps taken | 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 | Call handling, camera remote control, phone unlocking | 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, Email | Missed calls, calendar, incoming calls, applications |
| Vibrating Alert | Yes | Yes |
| Feedback Type | - | Vibration alert, visual interface |
| Navigation (GPS) | - | GPS receiver |
| CONNECTIVITY | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Wireless Interface | IEEE 802.11b/g/n, Bluetooth 4.1 | Bluetooth 5.0 BLE |
|---|
| DISPLAY | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Type | AMOLED - colour | AMOLED - colour |
|---|---|---|
| Resolution | 400 x 400 pixels | 454 x 454 pixels |
| Screen Size | 1.39" | 1.39" |
| Pixel Density | 287 ppi | 326 ppi |
| Screen Protection | Corning Gorilla Glass 3 (scratch resistant glass), 2.5D Arc Glass | - |
| Always On Display (AOD) | - | Yes |
| INPUT DEVICE | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Touchscreen Technology | Capacitive | - |
|---|---|---|
| Type | Touch sensitive screen (multi-touch) | Touch sensitive screen, touch buttons |
| CASE | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Case Size | 45 mm | - |
|---|---|---|
| Case Shape | Round | Round |
| Case Details | Gunmetal | Ember black | Wild green | Desert khaki | Astro black and gold |
| BAND | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Band Type | Band | Strap |
|---|---|---|
| Band Width | 22 mm | - |
| Fits Wrist with Circumference | - | 140-205 mm |
| Changeable | Yes | - |
| Clasp Type | - | Buckle |
| Band Material | Leather | Silicone |
| Band Colour | Dark brown | Ember black | Wild green | Desert khaki |
| STORAGE | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Storage Capacity | 4 GB | - |
|---|
| RAM | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| RAM Size | 512 MB | - |
|---|
| CPU | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Manufacturer | Qualcomm | - |
|---|---|---|
| CPU Type | Snapdragon Wear 2100 | - |
| BATTERY | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Technology | Lithium polymer | - |
|---|---|---|
| Capacity | 340 mAh | 500 mAh |
| Battery Life | - | 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 |
| Recharge Time | - | 2 hour(s) |
| MISCELLANEOUS | ASUS ZenWatch 3 WI503Q | Amazfit T-Rex 2 |
|---|
| Included Accessories | Power adapter, magnetic charging cable | Magnetic charging dock |
|---|---|---|
| Preloaded Software | Stopwatch, Alarm, Timer | Zepp App |
| Compliant Standards | IP67 | MIL-STD 810G |
| Max Depth of Water Resistance | 1 m | 100 m |
| Warranty | 1-year warranty | 1-year warranty |
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