Amazfit T-Rex 3 Smartwatch Update: New App Available Now

Key Takeaways

1. The Amazfit T-Rex 3 smartwatch has received a new update (version 3.5.4.8) in 2025, following the previous update (version 3.4.4.7) in January.
2. Users reported increased battery drain, possibly due to the new always-on heart rate monitoring feature.
3. The update introduces a Ski machine workout option, enhanced Fishing activity tracking, and improved Strength training features.
4. A new Audio Control app allows users to manage music from their smartphones directly from the smartwatch.
5. Users can now display route checkpoints on the watch when importing tracks through the Zepp app, but there is no fix yet for the battery drain issue.


The Amazfit T-Rex 3 smartwatch has gotten a new update, now at version 3.5.4.8. This marks the second update of 2025 for this device, following the earlier version 3.4.4.7 that was released in January. Soon after the update, many users reported a quicker-than-usual battery drain, which many think might be due to the new heart rate monitoring feature that’s always on.

New Features in Update

With the latest software version 3.5.4.8, there’s a new Ski machine workout option added for the T-Rex 3 users. This new feature can track different metrics, including distance and stroke rate. The Fishing activity now shows the GPS location of the fishing rod on the workout log, which helps users find the best places to fish. Additionally, Strength training has seen enhancements, making it more user-friendly to adjust during rest times.

Additional Improvements

As per the changelog, a new Audio Control app has been introduced, allowing users to manage music played from their connected smartphones directly from their wrist. When importing a route track through the Zepp app, users can now select to display checkpoints right on the watch. Furthermore, Amazfit claims to have fine-tuned its notification system for a smoother experience during workouts. Still, there’s no word yet on a fix for the battery drain problem that has been troubling some users.

This update is a 13.47 MB download and can be accessed through the Zepp app by navigating to Profile > Amazfit T-Rex 3 > System Update. The Amazfit T-Rex 3 smartwatch is currently available in three colors, including the newly introduced Haze Grey, with a price tag of $279.99 on Amazon.

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