Amazfit GTS 4 vs Fitbit Charge 6
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Amazfit GTS 4 |  Fitbit Charge 6 |
|---|---|---|
| Price | KSh 18,500.00 | KSh 20,000.00 |
| Display | 1.75-inch AMOLED | AMOLED |
| Battery capacity | 300 mAh rated | — |
| Water resistance | 5 ATM | 5 ATM / water resistant to 50 m; intended for suitable shallow-water use |
| Processor | Not listed | — |
| RAM | Not listed | — |
| Storage | Not listed | — |
| Operating system | Zepp OS 2.0 | — |
| Network / cellular | No cellular connection | — |
| Positioning / GNSS | Dual-band, circularly polarized GNSS supporting six satellite systems | — |
| Health & wellness features | 24-hour heart rate, blood oxygen and stress; one-tap measurement; readings are not medical diagnoses | Heart rate, blood oxygen, skin-temperature variation, ECG-compatible and EDA stress features; availability varies and wellness features are not medical diagnosis |
Full specifications
2 of 4 products
| Specification | Amazfit GTS 4 | Fitbit Charge 6 |
|---|---|---|
| Identity & design | ||
| Brand | Amazfit | Fitbit |
| Model | GTS 4 | Fitbit Charge 6 |
| Announced | September 2022 | September 2023 |
| Dimensions | 42.7 × 36.5 × 9.9 mm without heart-rate sensor base | 36.73 × 23.09 × 11.20 mm |
| Weight | 27 g without strap | 30 g |
| Build materials | Aluminum-alloy middle frame; high-gloss sprayed polycarbonate bottom shell | Aluminum case, Corning Gorilla Glass 3, and flexible silicone infinity band |
| Wrist size | 140–200 mm | Small: 130–170 mm; large: 170–210 mm; both sizes included |
| Strap / band | 20 mm quick-release fluoroelastomer or nylon strap | Flexible silicone infinity band with loop-and-peg closure |
| Controls / buttons | Touchscreen and stainless-steel navigation crown | Haptic side button and AMOLED touchscreen |
| Display | ||
| Display | 1.75-inch AMOLED | AMOLED |
| Screen resolution | 390 × 450 pixels, 341 ppi | — |
| Display protection | Tempered glass with anti-fingerprint coating | Corning Gorilla Glass 3 |
| Display features | Always-on display; 150+ watch faces | Always-on display supported; increases power use |
| Performance & software | ||
| Processor | Not listed | — |
| CPU | Not listed | — |
| GPU | Not listed | — |
| RAM | Not listed | — |
| Storage | Not listed | — |
| Operating system | Zepp OS 2.0 | — |
| Connectivity | ||
| Network / cellular | No cellular connection | — |
| SIM / eSIM | No SIM or eSIM | — |
| Wi-Fi | 2.4 GHz Wi‑Fi | — |
| Bluetooth | Bluetooth 5.0 and BLE | Bluetooth Low Energy |
| NFC | NFC not listed | Built-in NFC; supported payment features vary by country and bank |
| Positioning / GNSS | Dual-band, circularly polarized GNSS supporting six satellite systems | — |
| Ultra Wideband (UWB) | Not listed | — |
| Satellite features | Not listed | — |
| Audio & communication | ||
| Speaker | Built-in speaker | — |
| Microphone | Built-in microphone | — |
| Calling | Bluetooth calling when paired | — |
| Sensors, health & fitness | ||
| Sensors | BioTracker 4.0 PPG, accelerometer, gyroscope, geomagnetic, barometric altimeter and ambient-light sensor | Optical heart-rate monitor, 3-axis accelerometer, red/infrared SpO2 sensors, device temperature sensor, ambient-light sensor, multipurpose ECG/EDA electrical sensors, vibration motor, GPS and GLONASS |
| Health & wellness features | 24-hour heart rate, blood oxygen and stress; one-tap measurement; readings are not medical diagnoses | Heart rate, blood oxygen, skin-temperature variation, ECG-compatible and EDA stress features; availability varies and wellness features are not medical diagnosis |
| Sleep tracking | Sleep stages including REM, naps, breathing quality and sleep score | Sleep stages, sleep score and overnight wellness tracking |
| Sports / workout modes | 154 modes; automatic recognition of eight sports and strength exercises | Multiple exercise modes with built-in GPS |
| Training & outdoor features | Route import, real-time navigation, track-run mode and PeakBeats training status | — |
| Safety & emergency features | Not listed | — |
| Diving / depth features | Not rated for diving | — |
| Battery & durability | ||
| Battery capacity | 300 mAh rated | — |
| Battery life | Up to 8 days typical, 4 days heavy, 16 days saver; GPS up to 16/28/33 hours by mode | Up to 7 days; always-on display and SpO2 use require more frequent charging |
| Charging | Magnetic charging, approximately 2 hours | Proprietary charging cable; approximately 2 hours from 0–100% |
| Water resistance | 5 ATM | 5 ATM / water resistant to 50 m; intended for suitable shallow-water use |
| Durability / certifications | ISO 22810:2010 5 ATM; suitable for swimming, not hot showers or sauna | — |
| Compatibility | ||
| Phone compatibility | Android 7.0+ or iOS 12.0+ | Android 11.0 or later; iOS 16.4 or later; Bluetooth LE and internet required |
| Companion app | Zepp app | Google Health app |
| Colors | Infinite Black, Misty White, Autumn Brown, Rosebud Pink | Coral / Champagne Gold Aluminum; Porcelain / Silver Aluminum; Obsidian / Black Aluminum |
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