Amazfit T-Rex 3 Pro

Amazfit T-Rex 3 Pro Rugged Smartwatch ｜ AI Vitamin

: Amazfit (Zepp Health Corporation)
: Gorinchem, Netherlands

AI summary

Amazfit T-Rex 3 Pro is a sapphire and titanium GPS smartwatch in 48 mm and 44 mm sizes, combining Zepp Coach AI training, Zepp Flow voice assistance, 187 sports modes, offline route maps, health and sleep tracking, Bluetooth calls and a built-in flashlight with up to 25 days of typical battery life on the 48 mm model.

Pricing

Hardware options

Option	Price
T-Rex 3 Pro 48 mm	$399.99
T-Rex 3 Pro 44 mm	$399.99

Specifications

Key hardware details first, followed by the complete product specification.

Key specifications

Dimensions: 48 mm: 48 × 48 × 14 mm; 44 mm: 44.8 × 44.8 × 13.2 mm
Ingress protection: 10 ATM water resistance; certified freediving and scuba diving to 45 m
GPS: Dual-band GPS with six satellite positioning systems and a circularly polarized antenna
Battery life: Typical use: up to 25 days (48 mm) or 17 days (44 mm); heavy use: 10 or 8 days

AI & voice

Voice assistant: Zepp Flow natural-language controls in supported markets
Assistant languages: English, French, German, Italian, Spanish, Japanese, Korean and Portuguese

Accessories

External sensor support: Compatible Bluetooth heart-rate, cadence and cycling power sensors
Strap: Silicone; 22 mm width for 48 mm or 20 mm for 44 mm; wrist fit 145–210 / 140–205 mm

Audio & communications

Calling and audio: Built-in microphone and speaker; Bluetooth calls through a connected phone
Music: Local music storage and phone music control
Message replies: Android supports voice-to-text replies in supported messaging apps; iOS features differ

Capabilities & dependencies

Phone dependency: Zepp app for setup, synchronization and companion features; downloaded maps support offline navigation
Core task internet requirement: Online app services and AI features require connectivity; local watch tracking remains available

Cloud & subscription

Required subscription: Official T-Rex 3 Pro page lists no required subscription

Connection & companion

Connectivity: 2.4 GHz Wi-Fi and Bluetooth 5.2 BLE
Compatible platforms: Android 7.0+ or iOS 15.0+ with the Zepp app
Operating system: Zepp OS 5

Design & carry

Weight: 48 mm: 52 g; 44 mm: 46.8 g, without straps
Materials: Fiber-reinforced polymer case, grade 5 titanium bezel and buttons, sapphire glass
Officially listed colours: Tactical Black, Black Gold and Arctic Gold; colour availability depends on case size

Display

Panel and resolution: 48 mm: 1.5-inch AMOLED, 480 × 480, 322 PPI; 44 mm: 1.32-inch AMOLED, 466 × 466, 353 PPI
Peak brightness: Up to 3,000 nits with automatic brightness enabled under supported battery and temperature conditions
Touch input: Touchscreen with four physical buttons

Health & wellness

Health measurements: Heart rate, blood oxygen, stress, skin temperature, sleep stages, naps, breathing quality and HRV; not a medical diagnostic device
Recovery tracking: Readiness and recovery insights in the Zepp ecosystem

Location & routes

Offline maps: OpenStreetMap downloads, route import, turn-by-turn directions, POI search, rerouting and round-trip routes
Saved routes: Up to 100 saved routes

Power & charging

Battery capacity: 48 mm: 700 mAh; 44 mm: 500 mAh
Accurate GPS battery life: Up to 38 hours (48 mm) or 26 hours (44 mm), according to the detailed specification table
Other GPS battery modes: Power-saving: 74 / 51 hours; long GPS: 85 / 60 hours; max GPS: 116 / 86 hours, for 48 / 44 mm respectively
Low-temperature GPS use: Up to 25 hours (48 mm) or 14 hours (44 mm)
Charging method: Magnetic charging head; USB-C cable not included

Privacy & data

Sensors and data capture: Optical biometric measurements, motion, location and activity records
Data upload and processing: Account and connected service use are governed by the Zepp app privacy policy

Sensors

Heart-rate sensor: BioTracker 6.0 PPG with 5 photodiodes and 2 LEDs
Additional sensors: Accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient light sensor and temperature sensor

Sports & training

Sports modes: 187 modes, including HYROX, strength training, running, cycling and diving
Automatic recognition: 25 strength movements and 8 sports activities
AI coaching: Zepp Coach generates and adjusts training plans

Support & ownership

Warranty: 1-year limited warranty under the official US warranty policy
Security-update status: Official product page lists a September 2026 software update, version 11.1