The Amazfit T-Rex 3 just received its first major software boost of 2026. Zepp Health has officially released Firmware Version 4.3.8.2, migrating high-end “Pro” features—like Equivalent Pace and AI Voice Transcription—directly to the standard model.
If you are a trail runner, hiker, or data-driven athlete, this 14.86MB update is the “brain upgrade” your watch has been waiting for.
Here is a breakdown of what’s new and how to get it.
What’s New in the Amazfit T-Rex 3 Firmware 4.3.8.2?
This update focuses on precision pacing, navigation fluidity, and AI-powered workout logging.
- Equivalent Pace: Effort-based pacing for hilly terrain.
- Smoother Maps: Faster rotation and “Advance Up” navigation default.
- AI Voice Memos: Automatic transcription of mid-workout notes.
- Enhanced Connectivity: Support for Stryd pods and cycling power meters.
Precision Pacing: Why “Equivalent Pace” Matters
One of the most meaningful upgrades is the addition of Equivalent Pace and Average Equivalent Pace.
The Problem: On a steep 15% incline, your raw pace might drop to 12:00/mile, even though your heart rate is maxed out.
The Solution: Equivalent Pace calculates what your speed would be if you were running on a flat road at that same effort level. This helps trail runners maintain consistent intensity regardless of the elevation.
Pro Tip: You can find these new metrics under the data field settings for Outdoor Running and Trail Running modes.
Navigation & Mapping Improvements
Navigation is often where mid-range watches struggle, but Version 4.3.8.2 fixes two major pain points:
- Map Rotation: The map now rotates fluidly as you move, eliminating the “stutter” seen in previous firmware.
- Advance Up: The watch now defaults to keeping your direction of travel at the top of the screen. This makes following a GPX route much more intuitive while moving at speed.
AI Voice Memos: No Phone Required
You can now record short voice notes directly on the T-Rex 3. Once you sync with the Zepp App, the system uses AI to:
- Transcribe your voice into text notes.
- Identify specific workout data like reps, sets, and weight amounts.
- Organize those notes directly into your workout history for future review.
Expanded Sensor Support for Data Nerds
For those who treat their training like a science, the T-Rex 3 is now more compatible with third-party hardware:
- Stryd Sensors: Full support for Stryd pods during HYROX Race workouts.
- Cycling Power Meters: Connect your external power, cadence, and speed sensors for a complete indoor cycling profile.
Why This Update Matters
This update isn’t just about adding features—it makes the T-Rex 3 more workout-ready and versatile.
It builds on the previous update (4.3.7.1), which improved GPS accuracy and added handy features like a flashlight gesture and a new battery indicator.
At CES 2026, Zepp Health also showcased new devices, including:
- Amazfit Active Max – big display, long battery life
- Helio Glasses – HUD for running data
- V1Tal Food Camera – AI-powered nutrition tracking
All of this shows Zepp Health is focused on creating a connected and smarter fitness ecosystem.
Frequently Asked Questions (FAQ)
How do I update my Amazfit T-Rex 3?
Open the Zepp App > Profile > My Devices > Amazfit T-Rex 3 > System Update. Ensure your watch is on Wi-Fi for a faster download.
Conclusion
The Amazfit T-Rex 3 continues to be one of the best-value rugged watches of 2026. This latest update proves that Zepp Health is committed to software longevity.
Have you noticed a difference in your GPS accuracy after the update? Let me know in the comments below, or check out my Full Review of the Amazfit T-Rex 3 for more tips.
