Amazfit T-Rex 3 vs Amazfit Active 3 Premium
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Amazfit T-Rex 3 |  Amazfit Active 3 Premium |
|---|---|---|
| Price | KSh 33,000.00 | KSh 24,000.00 |
| Display | 1.5-inch AMOLED touchscreen | 1.32-inch AMOLED touchscreen |
| Battery capacity | 700 mAh rated | 365 mAh rated |
| Water resistance | 10 ATM; suitable for swimming and supported high-speed water sports subject to manufacturer guidance | 5 ATM; suitable for splashes, showering and swimming, but not hot showers or saunas |
| Positioning / GNSS | Dual-band, six-satellite positioning | Built-in five-satellite positioning |
| Health & wellness features | Heart rate, blood oxygen, stress, PAI and temperature insights; wellness measurements are not intended for medical diagnosis | 24-hour heart rate, blood oxygen, stress, skin-temperature, BioCharge, PAI and heart-rate recovery; wellness measurements are not intended for medical diagnosis |
Full specifications
2 of 4 products
| Specification | Amazfit T-Rex 3 | Amazfit Active 3 Premium |
|---|---|---|
| Identity & design | ||
| Brand | Amazfit | Amazfit |
| Model | T-Rex 3 | Active 3 Premium |
| Dimensions | 48.5 × 48.5 × 13.75 mm (heart-rate sensor base excluded) | 45 × 45 × 11 mm (heart-rate sensor base excluded) |
| Weight | 68.3 g without strap | 38 g without strap |
| Build materials | Stainless-steel bezel, polymer middle frame and Gorilla Glass touchscreen | Stainless-steel frame with sapphire-glass touchscreen |
| Wrist size | 145–210 mm | — |
| Strap / band | 22 mm liquid-silicone strap with classic pin buckle | 20 mm silicone strap with classic pin buckle |
| Controls / buttons | Four physical buttons and touchscreen | Four physical buttons and touchscreen |
| Display | ||
| Display | 1.5-inch AMOLED touchscreen | 1.32-inch AMOLED touchscreen |
| Screen resolution | 480 × 480 pixels, 322 ppi | 466 × 466 pixels, 353 ppi |
| Display protection | Gorilla Glass | Sapphire glass |
| Display features | Up to 2,000 nits peak brightness; always-on display and more than 400 watch faces | — |
| Connectivity | ||
| Wi-Fi | 2.4 GHz Wi-Fi | — |
| Bluetooth | Bluetooth 5.2 BLE | Bluetooth 5.3 BLE |
| Positioning / GNSS | Dual-band, six-satellite positioning | Built-in five-satellite positioning |
| Audio & communication | ||
| Speaker | — | Built-in speaker |
| Microphone | Built-in microphone | Built-in microphone |
| Calling | Zepp Flow voice control and speech-to-text replies when paired with a supported phone | Bluetooth calling when paired with a compatible phone |
| Sensors, health & fitness | ||
| Sensors | BioTracker 6.0 PPG biometric sensor with blood-oxygen support, accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient-light sensor and temperature sensor | BioTracker PPG biometric sensor (5PD + 2LED), accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient-light sensor and temperature sensor |
| Health & wellness features | Heart rate, blood oxygen, stress, PAI and temperature insights; wellness measurements are not intended for medical diagnosis | 24-hour heart rate, blood oxygen, stress, skin-temperature, BioCharge, PAI and heart-rate recovery; wellness measurements are not intended for medical diagnosis |
| Sleep tracking | Sleep stages, naps, sleep score, breathing quality and recovery insights | Sleep HRV, stages including REM, naps, sleep schedule, breathing quality and sleep score |
| Sports / workout modes | More than 170 sports modes | More than 170 sports modes, including HYROX and strength training with smart recognition |
| Training & outdoor features | Offline maps and navigation, GPS privacy controls, Zepp Coach and advanced running/outdoor metrics | Built-in running workouts, Zepp Coach plans, lactate threshold, running power, ground-contact time, Track Run, virtual pacer, offline OSM maps and compatible workout peripherals |
| Diving / depth features | Freediving support to 45 m under applicable certification | — |
| Battery & durability | ||
| Battery capacity | 700 mAh rated | 365 mAh rated |
| Battery life | Up to 27 days typical use, 40 days battery saver, 13 days heavy use, 42 hours accurate GPS or 180 hours maximum GPS | Up to 12 days typical use, 7 days heavy use, 4 days AOD, 24 hours continuous GPS or 76 hours power-saving GPS |
| Charging | Magnetic charging base; approximately 3 hours; USB-C cable is not included | Magnetic charging head; USB-C cable is not included |
| Water resistance | 10 ATM; suitable for swimming and supported high-speed water sports subject to manufacturer guidance | 5 ATM; suitable for splashes, showering and swimming, but not hot showers or saunas |
| Durability / certifications | EN 13319, ISO 6425 and GB/T 18828 certification for freediving to 45 m; operating range includes -30°C to 70°C | ISO 22810:2010 water-resistance testing; TUV-SUD report 68.189.26.01120.01 |
| Compatibility | ||
| Phone compatibility | Android 7.0 or later; iOS 14.0 or later | Android 7.0 or later; iOS 14.0 or later |
| Companion app | Zepp app | Zepp app |
| Colors | Onyx, Lava or Haze Gray | Apex Silver, Atlas Blue or Aero White |
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