Amazfit GTR 4 vs Fitbit Charge 6
The Verdict
Amazfit GTR 4 delivers exceptional battery longevity with up to 14 days of normal use and a larger 1.43-inch AMOLED display at 466x466 resolution, making it ideal for users prioritizing screen real estate and extended wear between charges. Fitbit Charge 6 compensates with a more compact form factor, ECG capability for heart health monitoring, and deeper Google ecosystem integration through Fitbit OS. Both feature 5 ATM water resistance, SpO2 tracking, and Bluetooth 5.0 connectivity. GTR 4's advantages include superior display quality, NFC payments, WiFi connectivity, and $40 lower price point, while Charge 6 offers medical-grade ECG for cardiac insights,unavailable on GTR 4. For fitness enthusiasts valuing battery life and general health metrics, GTR 4 is the stronger choice; choose Charge 6 if ECG monitoring and Google Home integration justify its shorter 7-day battery life.
Who Should Buy
Buy the Amazfit GTR 4 if…
- →Large 1.43" AMOLED display is sharp and vivid with always-on option
- →Dual-band GPS rivals Garmin for outdoor tracking accuracy
- →14-day battery is outstanding for an AMOLED smartwatch
Buy the Fitbit Charge 6 if…
- →ECG and built-in GPS on a fitness band at $159 is remarkable value
- →7-day battery life means weekly charging at most
- →Google Maps, YouTube Music, and Google Wallet integration
Category Scores
Pros & Cons
Amazfit GTR 4
Pros
- Large 1.43" AMOLED display is sharp and vivid with always-on option
- Dual-band GPS rivals Garmin for outdoor tracking accuracy
- 14-day battery is outstanding for an AMOLED smartwatch
- Built-in speaker and microphone for Bluetooth phone calls
- 150+ sport modes with auto-detection for common activities
Cons
- Zepp OS app ecosystem is extremely limited
- No NFC for contactless payments in most regions
- Cannot reply to notifications — view and dismiss only
- Build quality and software polish trail Apple and Samsung
Fitbit Charge 6
Pros
- ECG and built-in GPS on a fitness band at $159 is remarkable value
- 7-day battery life means weekly charging at most
- Google Maps, YouTube Music, and Google Wallet integration
- Physical side button returns — much better than Charge 5's touch sensor
- Slim, lightweight band form factor for 24/7 comfort
Cons
- Small screen limits app usability and readability
- Many features require Fitbit Premium subscription
- No voice assistant or microphone on the band
- Limited third-party app support compared to full smartwatches
Full Specifications
| Spec | Amazfit GTR 4 | Fitbit Charge 6 |
|---|---|---|
| Software | Zepp OS 2.0 | Fitbit OS (Google integration) |
| Body | ||
| Weight | 52 g (without strap) | 37 g |
| Case material | Aluminum alloy with stainless steel crown | Aluminum |
| Water resistance | 5ATM | 5ATM |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 14 days (typical usage) | Up to 7 days |
| Display | ||
| Size | 46mm (1.43 inches) | 1.04 inches |
| Type | AMOLED | AMOLED |
| Always-on display | ||
| Resolution | 466 x 466 | 234 x 156 |
| Processor | ||
| Chipset | Huami custom processor | Fitbit custom processor |
| Connectivity | ||
| GPS | ||
| NFC | ||
| Wi-Fi | ||
| Cellular | ||
| Bluetooth | 5.0 | 5.0 |
Related Comparisons
This comparison is based on verified manufacturer specifications covering display, performance, camera, battery, and build quality. Scores are generated by analyzing specs across weighted categories on a 10-point scale. Learn more about our methodology.
Explore more in smartwatches, see all Amazfit products or all Fitbit products. View full details for the Amazfit GTR 4 or the Fitbit Charge 6.