Which smartwatch is more accurate for step counting between Garmin Instinct 3 and Amazfit T-Rex Ultra 2?

The Garmin Instinct 3 was found to be slightly more accurate, with a difference of only one step compared to the Amazfit T-Rex Ultra 2 in a controlled test.

Does the Amazfit T-Rex Ultra 2 have accurate elevation gain data?

The test indicated that the Amazfit T-Rex Ultra 2 might overcount elevation gain data, showing up to 60 feet more than the control measurements.

Which smartwatch consumes more battery: Garmin Instinct 3 or Amazfit T-Rex Ultra 2?

The Garmin Instinct 3 consumed twice as much battery power as the Amazfit T-Rex Ultra 2 during the comparative walk test.

Home / Technology / Garmin vs. Amazfit: Step-by-step accuracy test

Garmin vs. Amazfit: Step-by-step accuracy test

1 Mar

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Summary

Garmin Instinct 3 narrowly beat Amazfit T-Rex Ultra 2 in step count accuracy.
Amazfit T-Rex Ultra 2 showed inflated elevation gain data compared to control.
Despite accuracy win, Garmin Instinct 3 used twice the battery of its competitor.

Garmin vs. Amazfit: Step-by-step accuracy test

A recent head-to-head test between the Garmin Instinct 3 and the Amazfit T-Rex Ultra 2 revealed the Garmin device as the more accurate fitness tracker, albeit by a slim margin. Both smartwatches, launched in early 2025 and February 2026 respectively, are built for outdoor enthusiasts with durable designs and GPS capabilities.

During a controlled 5,000-step walk, the Garmin Instinct 3 and Amazfit T-Rex Ultra 2 provided step counts separated by just one step. Both devices closely matched the manual count and Strava's measurement. However, the Amazfit T-Rex Ultra 2's data showed a notable discrepancy in elevation gain, overcounting by up to 60 feet.