The Amazfit T-Rex 3, the rest of the seris, is a rugged smartwatch crafted for outdoor adventurers, fitness enthusiasts, and those who need a watch as tough as their lifestyle. With upgraded features like a more robust design, expanded sports modes, and longer battery life, it positions itself as a cost-effective alternative to pricier models like the Garmin Fenix 8, Apple Watch Ultra 2, or Samsung Galaxy Watch Ultra.
After spending some quality time with the T-Rex 3, it’s clear to us that this is a smartwatch that has learned from its predecessors and truly embraces its rugged identity.
Editor
Jennifer chevron_right
Table of Contents
Design & Build
The Amazfit T-Rex 3 is designed for the rugged outdoors. Sporting a stainless steel bezel, it looks much more premium compared to the T-Rex 2’s plastic-heavy build. The military-grade durability remains, but now the watch actually feels as tough as it looks.
The 48.5mm hexagonal case is undeniably large, but surprisingly, it sits comfortably on the wrist without feeling overly bulky. That is to say, it’s definitely more suited for larger-sized people.
The Amazfit T-Rex 3 is very resilient. It’s waterproof up to 100 meters, meaning you can confidently take it swimming or diving. It can also withstand extreme temperatures, from -30°C to 70°C, so it can keep up with even the toughest hiking track.
Display
Amazfit has made some significant upgrades to the T-Rex 3’s display. The 1.5-inch AMOLED screen is larger and brighter than its predecessor, boasting a 480 x 480 resolution that makes it easy to read even in direct sunlight.
The always-on mode is particularly useful for quick updates without tapping the screen. The colours on the display lean slightly toward the saturated side, which can make visuals pop but feel less natural. For the price, it’s a good trade-off, but those used to ultra-crisp displays might find it a notch below their expectations.
Performance & Features
The Amazfit T-Rex 3 now supports 177 sports modes, ranging from common activities like running and cycling to niche ones like Hyrox, ultramarathons, and diving. It’s clear Amazfit wants this watch to cater to everyone, from weekend warriors to elite athletes.
The dual-band GPS is accurate and reliable, even in challenging environments like dense forests. The new mapping and navigation features are intuitive, with offline map downloads and turn-by-turn directions. It’s not as detailed as Garmin’s offerings, but for the price, it’s impressive.
Another new feature on this watch is the Heart Rate Variability (HRV), which tracks your heart rate closely while you sleep. Coupled with Amazfit’s already reliable sleep tracking, it provides deeper insights into your overall well-being.
Most notably, the Amazfit T-Rex 3 now comes with AI! Powered by Zepp OS 4.0, the T-Rex 3 is smarter than ever, integrated with the Zepp Flow assistant that allows you to use voice commands and reply to messages via speech-to-text.
Plus, it has 26GB of storage on the watch itself, so you can store music and maps for easy access offline!
Battery
If there’s one feature that blew me away, it’s the battery life. The 700mAh battery is a significant upgrade, giving you up to 27 days of typical use. That’s almost a month of not worrying about charging!
During my usage, which included tracking workouts, using GPS, and receiving notifications, I averaged around 3–5 weeks before needing to recharge. Even with the most accurate GPS mode enabled, the T-Rex 3 held up for 42 hours.
However, charging is slower than I’d like, taking about three hours for a full charge. But given how infrequently you need to charge it, this feels like a minor inconvenience.
One thing to note, though, is that the charging puck is separate from the charging cable, which is quite different from other brands. The charging puck is not even the same one from the previous generation, which makes it really inconvenient for someone who has a collection of different Amazfit smartphones. Hopefully, one day, Amazfit will standardise their chargers across their lineup.