Amazfit GTR 4 vs Fitbit Sense 2
Which one should you buy?
Who leads where?
- Health Sensors and FeaturesFitbit Sense 2
- KasaAmazfit GTR 4
- Positioning and GNSSAmazfit GTR 4
- Battery and ChargingAmazfit GTR 4
- ConnectivityFitbit Sense 2
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 GTR 4No reviews yet |  FitbitFitbit Sense 2No reviews yet | |
|---|---|---|
| Key Differences | ||
| Case Size | 46 mm | 40.5 mm |
| Battery Life | up to 336 hours | up to 144 hours |
| ECG App | — | Yes |
| Water Resistance | 5 ATM | 50m |
| Health Sensors and Features | ||
| Heart Rate Sensor | Yes | Yes |
| SpO2 Sensor | Yes | Yes |
| ECG Sensor | — | Yes |
| Skin Temperature Sensor | — | Yes |
| ECG App | — | Yes |
| Display | ||
| Size | 1.43" | — |
| Panel | AMOLED | AMOLED |
| Resolution | 466x466 | — |
| Kasa | ||
| Case Size | 46 mm | 40.5 mm |
| Case Thickness | 10.6 mm | 11.2 mm |
| Weight | 34 g | 37.64 g |
| Case Material | Aluminium alloy and polycarbonate | Aluminum |
| Front Glass | Tempered Glass | Corning Gorilla Glass 3 |
| Strap Width | 22 mm | — |
| Positioning and GNSS | ||
| GNSS Receiver | Yes | Yes |
| Dual-Band GNSS | Yes | — |
| GNSS Systems | — | GPS, GLONASS |
| Battery and Charging | ||
| The figure the maker states | up to 336 hours | up to 144 hours |
| What that figure measures | In typical use | Normal use |
| Capacity | 475 mAh | — |
| Charging Type | Magnetic charging | — |
| Water and Dust Resistance | ||
| Water Resistance | 5 ATM | 50m |
| Connectivity | ||
| Bluetooth | 5.0 | — |
| NFC | — | Yes |
| Speaker | — | Yes |
| Microphone | — | Yes |
| Software | ||
| Phone Compatibility | Android 7.0 and above, iOS 12.0 and above | Android 11.0 and above, iOS 16.4 and above |
Fitbit Sense 2 leads on 6 of 10 compared specs.
This table is based on manufacturers official specifications. Winning on paper does not always mean a difference in everyday use.