Amazfit T-Rex Dual Solar vs T-Rex 3 specs comparison
The regular T-Rex 3 remains the value option and already covers most of the essentials, including AMOLED, dual-band GPS, offline maps and strong battery life. The Dual Solar is the much more specialised choice, adding sapphire, titanium, a brighter display, a flashlight and that dual-sided solar system for people who genuinely spend days away from power.
Full comparison
The full record
76 specifications across 6 areas, with 22 genuine differences.
1. Design & display Amazfit T-Rex 3
Fact
Amazfit T-Rex Dual Solar
Amazfit T-Rex 3
Release date
2026-09-22
2024-09
Physical size
51.4 mm diameter; 16.9 mm thick including heart-rate sensor; 14.5 mm excluding sensor
48.5 x 48.5 x 13.75 mm
Weight
69 g without strap
68.3 g
Material
Grade 5 titanium bezel and buttons; fiber-reinforced polymer middle frame; Grade 5 titanium and glass-ceramic back
Stainless steel bezel. Polymer middle frame.
Water resistance
10 ATM; recreational diving to 50 m
10 ATM; 45 m dive rating
Color options
Basalt Black
Onyx
Display type
AMOLED
AMOLED, 2000 nits
Display size
1.32 inch
1.5 inch
Display resolution
466 x 466 pixels (353 ppi)
480 x 480 pixels
Display protection
Sapphire glass
Gorilla Glass with anti-fingerprint coating
2. Battery & charging Amazfit T-Rex 3
Fact
Amazfit T-Rex Dual Solar
Amazfit T-Rex 3
Battery
Rechargeable battery; 660 mAh
Rechargeable battery; 700 mAh
Battery life
Up to 25 days typical; 13 days heavy use; up to 34 days with front solar / 51 days with rear solar (3 h/day at 50,000 lux); up to 41 hours accurate GPS; Outdoor Extreme up to 40 days / 180 days with continuous rear solar at 50,000 lux
Up to 27 days typical; 13 days heavy use; 42 hours accurate GPS; 114 hours long-battery GPS; 180 hours maximum GPS
Charging
Magnetic charging head; dual-sided solar charging
Magnetic, 2pin pogo pin charging
3. Sensors & positioning No clear edge
Fact
Amazfit T-Rex Dual Solar
Amazfit T-Rex 3
GNSS type
Built-in dual-band GNSS
Built-in dual-band GNSS
GPS
Yes
Yes
GALILEO
Yes
Yes
GLONASS
Yes
Yes
QZSS
Yes
Yes
Beidou
Yes
Yes
Accelerometer
Yes
Yes
Gyroscope
Yes
Yes
Barometric altimeter
Yes
Yes
Compass
Yes
Yes
Geomagnetic
Yes
Yes
Ambient light sensor
Yes
Yes
Optical heart rate
Yes
Yes
Electrical heart rate
No
No
SpO2
Yes
Yes
Temperature
Yes
Yes
Galvanic skin response
No
No
Microphone
Yes
Yes
Speakers
Yes
No
Vibration motor
Yes
Yes
4. Health & activity Even
Fact
Amazfit T-Rex Dual Solar
Amazfit T-Rex 3
Steps
Yes
Yes
Distance
Yes
Yes
Calories burned
Yes
Yes
Floors
Yes
Yes
Sports tracking
180+ sports modes
170+ sports modes
Sleep
Yes
Yes
Heart rate
Yes
Yes
HRV
Yes
Yes
Stress
Yes
Yes
Blood oxygen
Yes
Yes
Respiration rate
No
No
Skin temperature
Yes
Yes
ECG
No
No
Blood pressure
No
No
Body composition
No
No
Glucose
No
No
Hydration level
No
No
UV exposure
No
No
Calorie intake
No
No
Hyperglycemia risk assessment
No
No
Arterial stiffness detection
No
No
Pulse wave arrhythmia analysis
No
No
No significant differences in this area.
5. Smart features No clear edge
Fact
Amazfit T-Rex Dual Solar
Amazfit T-Rex 3
Smartphone compatibility
Android 8.0+ and iOS 17.0+
Android and iOS
Operating system at launch
Zepp OS 6
Zepp OS 4
Storage
26 GB available for maps, music, apps and data
Up to 26 GB available for maps, music, apps and data
Bluetooth
Yes (5.2)
Yes (5.2)
Wi-Fi
Yes (2.4 GHz)
Yes (2.4 GHz)
NFC / connected pay
Yes (Zepp Pay, region-dependent)
Yes (Zepp Pay, region-dependent)
UWB
No
No
Cellular
No
No
Smartphone notifications
Yes
Yes
Bluetooth calling
Yes
No
Smartphone music control
Yes
Yes
On-board music storage
Yes
Yes
Voice assistant
Zepp Flow
Zepp Flow
6. Navigation & safety Amazfit T-Rex Dual Solar
Fact
Amazfit T-Rex Dual Solar
Amazfit T-Rex 3
Maps
Yes (base, contour and ski-resort maps)
Yes (offline base and contour maps)
Offline maps
Yes
Yes
Navigation
Yes (turn-by-turn, POI display, route planning and waypoint navigation)
Yes (turn directions and offline navigation)
Emergency SOS
No
No
Satellite SOS
No
No
Fall detection
No
No
LED flashlight
Yes
No
Diving
Yes (recreational diving to 50 m)
Yes (45 m freediving)