Adventure Watches Head to head
Amazfit T-Rex 3 Pro vs Garmin Instinct 3 50mm
The Amazfit T-Rex 3 Pro leads on battery, smartwatch use (rated), GPS battery, most accurate mode, offline maps on the watch and sapphire lens. They are level on dual-frequency GPS, flashlight, water resistance, ECG and cellular version available. Both carry the same list price.
Amazfit T-Rex 3 Pro 48mm
$399.99
Maker's list price, checked Oct 7, 2026
Model T-Rex 3 Pro (48mm)
Leads on 4 of 9 specs
Garmin Instinct 3 50mm AMOLED
$399.99
Maker's list price, checked Oct 7, 2026
Model 010-03020-00
Leads on 0 of 9 specs
Who leads on specs?
Counted on the 9 specs both makers publish.
As an Amazon Associate, DupeMap earns from qualifying purchases. Rankings come from published specs, never from commissions. Amazon prices and availability are accurate as of the date and time shown and are subject to change. The price and availability shown on Amazon at the time of purchase apply. How we make money and why you can check it.
Choose the Amazfit T-Rex 3 Pro if
Battery, smartwatch use (rated), GPS battery, most accurate mode, offline maps on the watch and sapphire lens matter more to you than the price difference.
Choose the Garmin Instinct 3 50mm if
It leads on none of the specs both makers publish.
Spec by spec
Every spec side by side. A tick and a green cell mark the better figure.
| Spec | Amazfit T-Rex 3 Pro | Garmin Instinct 3 50mm | Who leads |
|---|---|---|---|
| List price | $399.99 | $399.99 | Level |
| Battery, smartwatch use (rated) | 600 hr | 576 hr | Amazfit T-Rex 3 Pro |
| GPS battery, most accurate mode | 38 hr | 30 hr | Amazfit T-Rex 3 Pro |
| Case weight (no band) | 52 g | Not listed | Can’t compare: not listed |
| Dual-frequency GPS | Yes | Yes | Level |
| Offline maps on the watch | Yes | No | Amazfit T-Rex 3 Pro |
| Flashlight | Yes | Yes | Level |
| Sapphire lens | Yes | No | Amazfit T-Rex 3 Pro |
| Water resistance | 100 m | 100 m | Level |
| ECG | No | No | Level |
| Cellular version available | No | No | Level |
| Case size | 48 mm | 50 mm | For information |
