In depth comparison and review of Garmin Forerunner 245 and Amazfit T-Rex Pro. 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 | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Product Type | Sport watch | Smart watch |
|---|---|---|
| Supported Host Device OS | - | iOS 10 or later, Android 5.0 (Lollipop) or later |
| Activity/Sport | Running, swimming, ski, cycling | Multisport |
| Wearing Style | Watch style | Watch style |
| Width | 42.3 mm | - |
| Height | 42.3 mm | - |
| Depth | 12.2 mm | - |
| Weight | 38.5 g | - |
| Body Details | - | With band: 59.4 g |
| Body Material | Fibre-reinforced polymer | Polycarbonate |
| Protection | Waterproof | Water-resistant, temperature protection, salt fog protection, freezeproof |
| Colours | Black | Desert grey |
| Clock Display | Yes | Yes |
| FEATURES | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Sensors | Accelerometer, electromagnetic compass, optical heart sensor | Ambient light sensor, 3-axis gyro sensor, geomagnetic sensor, barometric altimeter, 3-axis accelerometer, BioTracker 2 PPG biological tracking optical sensor |
|---|---|---|
| Tracking Data | Distance, time, speed, heart rate, stress level | Distance, calories burned, sleep activity, heart rate, blood oxygen saturation |
| Goal Setting | Yes | Yes |
| Features | Music remote handling, camera remote control, find phone function, VO2 max, HR zones, Move IQ, Garmin Connect compatible, Find my Device, rejecting a call, Garmin Elevate, TrueUp, Body Battery | Music remote handling, event reminders |
| Notifications | SMS, social apps, incoming calls | SMS, incoming calls, applications |
| Vibrating Alert | - | Yes |
| Navigation (GPS) | GPS/GLONASS/Galileo receiver | GPS/GLONASS/Galileo/BeiDou receiver |
| CONNECTIVITY | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Wireless Interface | Bluetooth, ANT+ | Bluetooth 5.0 |
|---|
| DISPLAY | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Type | Memory-in-Pixel LCD - colour - transflective | AMOLED - colour |
|---|---|---|
| Resolution | 240 x 240 pixels | 360 x 360 pixels |
| Screen Size | 1.2" | 1.3" |
| Screen Protection | Corning Gorilla Glass 3 (scratch resistant glass) | Tempered glass |
| Always On Display (AOD) | - | Yes |
| INPUT DEVICE | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Type | - | Touch sensitive screen |
|---|
| CASE | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Case Shape | Round | Round |
|---|---|---|
| Case Details | Black | Meteorite black | Steel blue |
| BAND | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Band Type | Band | Band |
|---|---|---|
| Band Width | 20 mm | 22 mm |
| Fits Wrist with Circumference | 127-204 mm | - |
| Changeable | Yes | - |
| Clasp Type | Buckle | Buckle |
| Band Material | Silicone | Silicone rubber |
| Band Colour | Grey | Merlot | Meteorite black | Blue steel |
| BATTERY | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Technology | - | Lithium polymer |
|---|---|---|
| Capacity | - | 390 mAh |
| Battery Life | - | 18 day(s) |
| Battery Life Details | GPS mode - up to 24 hour(s) Smartwatch mode - up to 7 days |
Typical usage - up to 18 days Heavy usage - up to 9 days GPS mode - up to 40 hour(s) |
| Rechargeable Battery | - | Yes |
| Recharge Time | - | 1.5 hour(s) |
| MISCELLANEOUS | Garmin Forerunner 245 | Amazfit T-Rex Pro |
|---|
| Included Accessories | Charging/data cable | Magnetic charging dock |
|---|---|---|
| Preloaded Software | Calendar, Weather, Timer, Fitness Age | - |
| Max Depth of Water Resistance | 50 m | 100 m |
| Max Operating Temperature | - | 70 °C |
| Min Operating Temperature | - | -40 °C |
| Warranty | - | 1-year warranty |
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