Amazfit T-Rex 3 vs Apple Watch SE 3 40mm
Which one should you buy?
Who leads where?
- CaseApple Watch SE 3 40mm
- Positioning and GNSSAmazfit T-Rex 3
- Battery and ChargingAmazfit T-Rex 3
Wins are counted from the official values in the table below; the BUY / CONSIDER / WAIT call comes from each product's own decision box. We do not predict prices.
 AmazfitAmazfit T-Rex 3No reviews yet |  AppleApple Watch SE 3 40mmNo reviews yet | |
|---|---|---|
| Key Differences | ||
| Case Size | 48.5 mm | 40 mm |
| Processor | No data | Apple S10 |
| Battery Life | up to 648 hours | up to 18 hours |
| Water Resistance | 10 ATM | 50m |
| Health Sensors and Features | ||
| Heart Rate Sensor | Yes | Yes |
| SpO2 Sensor | Yes | No data |
| Skin Temperature Sensor | No data | Yes |
| Atrial Fibrillation Notification | No data | Yes |
| Sleep Tracking | No data | Yes |
| Fall Detection | No data | Yes |
| Crash Detection | No data | Yes |
| Display | ||
| Size | 1.5" | No data |
| Panel | AMOLED | OLED (LTPO) |
| Resolution | 480x480 | 324x394 |
| Peak Brightness | No data | 1000 nit |
| Always-On Display | No data | Yes |
| Case | ||
| Case Size | 48.5 mm | 40 mm |
| Case Thickness | 13.75 mm | 10.7 mm |
| Weight | 68.3 g | 26.3 g |
| Case Material | Stainless steel and polymer | Aluminum |
| Front Glass | Corning Gorilla Glass | No data |
| Strap Width | 22 mm | No data |
| Positioning and GNSS | ||
| GNSS Receiver | Yes | Yes |
| Dual-Band GNSS | Yes | No |
| GNSS Systems | No data | GPS, GLONASS, Galileo, QZSS, BeiDou |
| Battery and Charging | ||
| The figure the maker states | up to 648 hours | up to 18 hours |
| What that figure measures | In typical use | Normal use |
| Capacity | 700 mAh | No data |
| Charging Type | Magnetic charging | Fast charging |
| Water and Dust Resistance | ||
| Water Resistance | 10 ATM | 50m |
| Rated Depth | 45 m | No data |
| Performance | ||
| Processor | No data | Apple S10 |
| Storage | No data | 64 GB |
| Connectivity | ||
| Cellular | No data | Optional |
| Wi-Fi | No data | Wi-Fi 4 |
| Bluetooth | 5.2 | 5.3 |
| Speaker | No data | Yes |
| Microphone | Yes | Yes |
| Software | ||
| Operating System | No data | watchOS |
| Phone Compatibility | Android 7.0 and above, iOS 14.0 and above | iPhone 11 or later (iOS 26+) |
The two products are level on the compared specs.
This table is based on manufacturers official specifications. Winning on paper does not always mean a difference in everyday use.