AmazFit T-Rex Ultra vs Amazfit T-Rex 3 Pro
Compare specifications, current prices and availability. Choose up to four products from the same family.
Selected Item  AmazFit T-Rex Ultra Original price was: KSh 50,000.00.KSh 47,000.00Current price is: KSh 47,000.00. |
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At a glance
Key specifications and important differences. Full details follow below.
| Feature | AmazFit T-Rex Ultra |  Amazfit T-Rex 3 Pro |
|---|---|---|
| Price | Original price was: KSh 50,000.00.KSh 47,000.00Current price is: KSh 47,000.00. | Price range: KSh 55,000.00 through KSh 65,000.00 |
| Display | 1.39-inch AMOLED | AMOLED 48 mm: 1.5-inch 44 mm: 1.32-inch |
| Battery capacity | 500 mAh rated | 48 mm: 700 mAh rated 44 mm: 500 mAh rated |
| Water resistance | 10 ATM; ISO 22810:2010 | 10 ATM |
| Storage | Up to 2.3 GB available for music | — |
| Operating system | Zepp OS 3.5 | Zepp OS 5 |
| Positioning / GNSS | Built-in dual-band L1/L5 positioning; six satellite systems | Built-in six-satellite positioning with circularly polarized GPS antenna |
| Health & wellness features | 24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alerts | Heart rate, blood oxygen, stress, HRV, readiness and temperature insights; wellness measurements are not intended for medical diagnosis |
Full specifications
2 of 4 products
| Specification | AmazFit T-Rex Ultra | Amazfit T-Rex 3 Pro |
|---|---|---|
| Identity & design | ||
| Brand | Amazfit | Amazfit |
| Model | Amazfit T-Rex Ultra | T-Rex 3 Pro |
| Dimensions | 47.3 × 47.3 × 13.45 mm, excluding heart-rate sensor base | 48 mm: 48 × 48 × 14 mm 44 mm: 44.8 × 44.8 × 13.2 mm Heart-rate sensor base excluded |
| Weight | 89 g without strap | 48 mm: 52 g 44 mm: 46.8 g Without strap |
| Build materials | 316L stainless-steel bezel, back panel, bridge and buttons; polymer-alloy middle frame | Fiber-reinforced polymer case with Grade 5 titanium bezel and buttons; sapphire-glass touchscreen |
| Wrist size | 140–205 mm | 48 mm: 145–210 mm 44 mm: 140–205 mm |
| Strap / band | 22 mm silicone strap with classic pin buckle | Silicone quick-release strap 48 mm: 22 mm 44 mm: 20 mm |
| Controls / buttons | Four physical buttons; glass touchscreen | Four physical buttons and touchscreen |
| Display | ||
| Display | 1.39-inch AMOLED | AMOLED 48 mm: 1.5-inch 44 mm: 1.32-inch |
| Screen resolution | 454 × 454 pixels, 326 ppi | 48 mm: 480 × 480 pixels, 322 ppi 44 mm: 466 × 466 pixels, 353 ppi |
| Display protection | Glass | Sapphire glass |
| Display features | Up to 1,000 nits; Always-On Display; 120+ watch faces | Up to 3,000 nits peak brightness; always-on display |
| Performance & software | ||
| Storage | Up to 2.3 GB available for music | — |
| Operating system | Zepp OS 3.5 | Zepp OS 5 |
| Connectivity | ||
| Wi-Fi | 2.4 GHz Wi-Fi | 2.4 GHz Wi-Fi |
| Bluetooth | Bluetooth 5.0 BLE | Bluetooth 5.2 BLE |
| Positioning / GNSS | Built-in dual-band L1/L5 positioning; six satellite systems | Built-in six-satellite positioning with circularly polarized GPS antenna |
| Audio & communication | ||
| Speaker | No built-in speaker; audio through connected Bluetooth headphones | Built-in speaker |
| Microphone | — | Built-in microphone |
| Calling | — | Bluetooth calling when paired with a compatible phone |
| Sensors, health & fitness | ||
| Sensors | BioTracker PPG biometric sensor with SpO₂; accelerometer; gyroscope; geomagnetic sensor; barometric altimeter; ambient-light sensor | BioTracker 6.0 PPG biometric sensor (5PD + 2LED), accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient-light sensor and temperature sensor |
| Health & wellness features | 24-hour heart-rate, blood-oxygen and stress monitoring; one-tap measurement; PAI; breathing exercises; health alerts | Heart rate, blood oxygen, stress, HRV, readiness and temperature insights; wellness measurements are not intended for medical diagnosis |
| Sleep tracking | Sleep stages including REM; naps; sleep schedule; breathing quality; sleep score | Sleep stages, naps, sleep score, breathing quality and recovery insights |
| Sports / workout modes | 162 sports modes; smart recognition of 25 strength movements and 8 sports movements; freediving workouts | 187 sports modes with smart recognition for strength-training and sports movements |
| Training & outdoor features | Offline maps and route navigation; Zepp Coach; PeakBeats; Track Run; trajectory correction; Virtual Pacer; training templates and intervals; external heart-rate belt and cycling power meter; altitude, sun, moon and tide tools | Offline base, contour and ski maps; turn-by-turn navigation, POI search, route planning, round-trip routing, auto-rerouting, Zepp Coach and PeakBeats training metrics |
| Safety & emergency features | Storm warnings; altitude blood-oxygen reminders; abnormal heart-rate, low-SpO₂ and high-stress alerts | SOS tools and downloadable maps; requires appropriate setup and phone connectivity for supported communications |
| Diving / depth features | Outdoor and indoor freediving and spearfishing; depth and water-temperature data; rated to 30 m; EN13319 and ISO 6425 diving certifications | Freediving and scuba modes rated to 45 m; follow the manufacturer’s diving limits and safety guidance |
| Battery & durability | ||
| Battery capacity | 500 mAh rated | 48 mm: 700 mAh rated 44 mm: 500 mAh rated |
| Battery life | Typical: up to 20 days; saver: 25 days; clock: 50 days; heavy: 9 days; accuracy GPS: 28 h; automatic GPS: 46 h; power-saving GPS: 58 h; endurance GPS: 80 h; low-temperature GPS: 10 h | 48 mm: up to 25 days typical, 10 days heavy, 38 hours accurate GPS 44 mm: up to 17 days typical, 8 days heavy, 26 hours accurate GPS |
| Charging | Magnetic charging base; approximately 2 hours | Magnetic charging base |
| Water resistance | 10 ATM; ISO 22810:2010 | 10 ATM |
| Durability / certifications | Mud-resistant design; ultra-low-temperature mode down to −30 °C; SGS-certified 10 ATM testing; EN13319 and ISO 6425 diving certifications | Rugged outdoor construction with Grade 5 titanium controls and sapphire glass |
| Compatibility | ||
| Phone compatibility | Android 7.0 or later; iOS 12.0 or later | Android 7.0 or later; iOS 15.0 or later |
| Companion app | Zepp App | Zepp app |
| Colors | Abyss Black; Sahara | Black Gold (44mm), Black Gold (48mm); Gold/Grey, Tactical Black |
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