Amazfit GTS 4 vs Fitbit Inspire 3
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Amazfit GTS 4 |  Fitbit Inspire 3 |
|---|---|---|
| Price | KSh 18,500.00 | KSh 14,000.00 |
| 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, stress and activity tracking; availability varies and not intended for diagnosis |
Full specifications
2 of 4 products
| Specification | Amazfit GTS 4 | Fitbit Inspire 3 |
|---|---|---|
| Identity & design | ||
| Brand | Amazfit | Fitbit |
| Model | GTS 4 | Fitbit Inspire 3 |
| Announced | September 2022 | August 2022 |
| Dimensions | 42.7 × 36.5 × 9.9 mm without heart-rate sensor base | 39.32 × 18.6 × 11.75 mm |
| Weight | 27 g without strap | 17.69 g |
| Build materials | Aluminum-alloy middle frame; high-gloss sprayed polycarbonate bottom shell | Corning Gorilla Glass 3 and premium silicone classic wristband with plastic buckle and tang |
| Wrist size | 140–200 mm | Small: approximately 130–190 mm; large: approximately 160–220 mm; both sizes included |
| Strap / band | 20 mm quick-release fluoroelastomer or nylon strap | Premium silicone classic wristband; small and large sizes included |
| Controls / buttons | Touchscreen and stainless-steel navigation crown | Touch-sensitive side controls 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 | — |
| 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 | 3-axis accelerometer, optical heart-rate monitor, red/infrared SpO2 sensors, device-temperature sensor, ambient-light sensor, and vibration motor |
| 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, stress and activity tracking; availability varies and not intended for 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; connected GPS uses a paired phone |
| 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 10 days; actual life varies with features and usage |
| 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 | Midnight Zen, Lilac Bliss, or Morning Glow |
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