Amazfit GTS 4 vs Fitbit Charge 6
The Verdict
Both smartwatches deliver solid fitness tracking at competitive price points, but serve different priorities. Amazfit GTS 4 excels with its larger 1.75-inch AMOLED display (390 x 450 resolution) and exceptional 8-day battery life, making it ideal for users prioritizing screen real estate and minimal charging hassle. Fitbit Charge 6 counters with advanced health features including ECG capability and NFC payments ($40 cheaper), plus tighter Google ecosystem integration. Display quality favors Amazfit's generous screen, while Fitbit's compact form factor suits those preferring minimalism. Both offer dual SpO2 monitoring and reliable sleep tracking over 5ATM water resistance. Battery longevity gives Amazfit a meaningful advantage for travel-heavy users. For general fitness enthusiasts wanting maximum usability between charges, Amazfit GTS 4 edges ahead; for those valuing medical-grade ECG and Google Pay convenience, Fitbit Charge 6 justifies its selection despite shorter battery endurance.
Who Should Buy
Buy the Amazfit GTS 4 if…
- →Large 1.75" AMOLED display is bright and vivid for the price
- →Dual-band GPS provides accurate outdoor tracking rivaling Garmin
- →Ultra-lightweight at 27 g — one of the lightest smartwatches available
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 GTS 4
Pros
- Large 1.75" AMOLED display is bright and vivid for the price
- Dual-band GPS provides accurate outdoor tracking rivaling Garmin
- Ultra-lightweight at 27 g — one of the lightest smartwatches available
- 8-day battery comfortably outlasts Apple Watch and Galaxy Watch
- 150+ sport modes cover virtually every activity
Cons
- Zepp OS has a very limited third-party app ecosystem
- No NFC for contactless payments in most markets
- Notification interaction is basic — can't reply to messages
- Build quality feels less premium than Apple or Samsung at this price
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 GTS 4 | Fitbit Charge 6 |
|---|---|---|
| Software | Zepp OS 2.0 | Fitbit OS (Google integration) |
| Body | ||
| Weight | 27 g (without strap) | 37 g |
| Case material | Aluminum alloy | Aluminum |
| Water resistance | 5ATM | 5ATM |
| Health & Sensors | ||
| ECG | ||
| SpO₂ | ||
| Skin temperature | ||
| Heart rate | ||
| Sleep tracking | ||
| Battery | ||
| Battery life | Up to 8 days (typical usage) | Up to 7 days |
| Display | ||
| Size | 42mm (1.75 inches) | 1.04 inches |
| Type | AMOLED | AMOLED |
| Always-on display | ||
| Resolution | 390 x 450 | 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 GTS 4 or the Fitbit Charge 6.