SpecPair
Amazfit T-Rex Ultra
Amazfit

Amazfit T-Rex Ultra

$450Released 2023

Pros

  • Excellent 20-day battery life with always-on display
  • Dual-band six-satellite GPS for high accuracy
  • Rugged design with 15 military-grade certifications
  • Free-diving rated to 45 meters
  • Offline maps with route import support

Cons

  • No ECG, skin temperature, or NFC payments
  • No Wi-Fi or cellular connectivity
  • Zepp OS app ecosystem is limited
  • Heavier than most smartwatches at 89g
  • No third-party app store

Full Specifications

SpecificationAmazfit T-Rex Ultra
SoftwareZepp OS 2.0
Body
Weight89 g
Case materialStainless steel bezel, fiber-reinforced polymer case
Water resistance10 ATM, ISO 22810 certified for free-diving to 45m
Health & Sensors
ECG
SpO₂
Skin temperature
Heart rate
Sleep tracking
Battery
Battery lifeUp to 20 days typical use, 80 hours GPS
Display
Size1.39 inch
TypeAMOLED
Always-on display
Resolution454 x 454
Connectivity
GPS
NFC
Wi-Fi
Cellular
Bluetooth5.0

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