PR Nerd
PR Nerd
Training plans, running advice, and more.
← Back to comparisons
Head to Head

Amazfit T-Rex 3 vs Garmin Instinct 3

Both sit at training-tier analytics, but the Instinct 3 costs $130 more and rates higher, while the T-Rex 3 answers back with a bigger, brighter 2,000-nit AMOLED display and offline maps that the buttons-only Instinct doesn't offer.

Amazfit T-Rex 3Amazfit

Amazfit T-Rex 3

4.4
Best Rugged Value
Garmin Instinct 3Garmin

Garmin Instinct 3

4.6
Ultra Durable
$269
Lower price
MSRP
$399
Full Smartwatch
Watch Type
Semi-Smart
Solid Training Data
Training Data
Solid Training Data
iOS & Android
Phone
iOS & Android
4.4
Rating
4.6
Higher rated
42 hrs
Longer battery
GPS Battery Life
40 hrs
Dual-Band
GPS
Dual-Band
65g
Weight
52g
Lighter
46mm
Case Size
45/50mm
Yes
Takes calls
Wrist Calls
No
Yes
Has maps
Offline Maps
No
Local files only
More music options
Offline Music
No
10 ATM
Water Resistance
10 ATM
Best Rugged Value
Notable For
Ultra Durable
Best For
  • •You want a bright AMOLED touchscreen and real offline maps for less money
  • •You're comfortable with a newer, less established brand if the value is there
  • •You want Garmin's higher-rated, more durable pick and don't need a touchscreen
  • •$130 more is worth it for Garmin's ecosystem and reputation
The Full Story

The T-Rex 3 packs a 2,000-nit AMOLED display, dual-band GPS with offline maps, and 27 days of typical battery life into a MIL-STD-810G rugged case, all for a fraction of what Garmin or Suunto charge for similar durability. It won't match a Fenix's ecosystem depth, but as a budget alternative to the outdoor flagships, it's hard to beat.

The Instinct 3 trades the AMOLED glow for a screen that's easy to read in direct sun and a case that shrugs off drops. Solid running metrics without the smartwatch bloat, for runners who care more about durability than notifications.

*Estimated — this model's exact GPS battery life isn't published by the manufacturer. All figures are standard GPS mode, midsize case, no solar boost.

†Estimated — this model launched too recently to have an established customer rating yet.

This page contains affiliate links. If you purchase through them we earn a small commission at no extra cost to you.

Not sure either of these is right?

Answer four quick questions and get matched from every current watch we track.

Try the Watch Finder →