The Amazfit T-Rex 3 Pro arrives as a highly anticipated evolution of the original T-Rex 3, a watch that previously garnered significant interest due to its compelling price point and impressive spec sheet. As the name implies, the Pro version is essentially the T-Rex 3 “on steroids,” adding nearly every feature the previous model was criticized for missing.
While the original T-Rex 3 launched at $280, the Pro version retails for $399 in the USA. The T-Rex 3 Pro is attempting to do serious damage to the competition by offering a premium build, a super bright display, enhanced wellness metrics, and, most notably, routable offline maps—a feature previously found only on high-end Garmin watches in the dedicated sport watch category.
Design
The T-Rex 3 Pro maintains the robust, rugged aesthetic of the T-Rex line, but with notable material upgrades that reinforce its “Pro” status. The build quality is very good, and the overall construction feels rugged and robust.
A major change is the introduction of a titanium bezel and titanium buttons, replacing the stainless steel found on the original T-Rex 3. This swap makes the watch a little lighter and more premium. Crucially, the display now features a sapphire crystal lens that lends to more scratch-resistant protection, an upgrade over the Gorilla Glass on the standard version. The remaining case is made of a fiber-reinforced polymer plastic, with a metal-feeling backplate.
The watch is available in two sizes: a large 48mm diameter (the size reviewed) and a new, smaller 44mm diameter designed for smaller wrists. The 48mm model’s footprint is largely unchanged from the original T-Rex 3. It features a four-button layout and boasts 10 atmospheres (ATM) of water resistance.
The 48mm version features a large 1.5-inch AMOLED touch-enabled display. While the T-Rex 3 already had a bright 2,000 nits display, the Pro version amps it up to an astonishing 3,000 nits of peak brightness. The display is easily visible in direct sunlight at off angles in the lingering summer sun. The sapphire crystal seems to have a slightly better coating or higher quality than my comparison AmazFit Balance 2 but still struggles with hazy fingerprints and some glaring reflections.
One of the most requested features across multiple brands, the T-Rex 3 Pro finally includes a built-in LED flashlight. The light can be accessed quickly by swiping down from the top menu, or by pressing and holding the top left button. While having a flashlight on a watch might sound gimmicky, it can be quite useful, even in non-activity related, boring tasks—such as finding dropped car keys, navigating a dark hotel room, or finding toys under the couch.
The flashlight offers adjustable brightness, a boost mode (which requires a bit of an odd cool-down process), and a red mode for night use. While I don’t own another device with the dedicated flash, reaching up to 300 LUX, I’d debate similar usefulness as the flashlight found on something from the likes of Garmin.
The T-Rex 3 Pro also adds a speaker and a microphone, allowing users to take and make phone calls directly from the watch (though a paired phone is required, as the device is not cellular-enabled).
Software
The T-Rex 3 Pro runs a new version of the company’s Zepp OS. At first glance, the user interface seems identical to most other Amazfit watches. However, the flow of the UI has been frustratingly changed. Horizontal swiping through various widgets from the home screen has been removed in favor of swiping right for the app list and swiping left for notifications.
It’s a small thing, but going from wearing the Balance 2 that is just short of a few months on the market as my daily driver to the T-Rex 3 Pro took about a week to retrain that muscle memory. Small tweaks like this make user migration to new devices unnecessarily hard and just add useless dev hours when you can just simply have them function the same.
Swiping down accesses fully customizable widgets for various health metrics and apps. A new feature is BioCharge, which attempts to gauge a user’s remaining daily energy on a 0 to 100 scale, reflecting activity levels and sleep quality. BioCharge attempts to use these results to reflect the user feels. As I’ve mentioned in previous AmazFit features, I’m a big fan of BioCharge and find it the closest competition to Garmin’s Body Battery I’ve found on any other device.
The integration of a speaker and microphone enables more than just phone calls; it allows interaction with the Zepp Flow AI virtual assistant. Zepp Flow is powered by ChatGPT, meaning users can use voice commands to change watch settings (like screen brightness or starting an activity) or ask general knowledge questions.
For music, the watch allows users to upload MP3 files directly to the internal storage and pair earbuds for phone-free listening. However, it is important to note that the T-Rex 3 Pro does not support music streaming services like Spotify or Amazon Music.
The biggest software news is the inclusion of fully routable offline maps—a significant addition that makes the T-Rex 3 Pro a direct rival to high-end adventure watches. These maps are free and can be downloaded by region via the Zepp app.
I’ve used this mostly for the new round trip option to route a map to and back to the original location, but it’s more robust than that. You can also search for point of interest in the app, and it will attempt to build a map to sync to the T-Rex Pro. I was able to find the nearest Dunkin’ Donuts and secure a map to this shop without issues.
Lastly, you can use the custom mapper builder. In this example, you’d use the Zepp app to by picking two points on the landscape. The app then would build a course route for you and sync back to the watch, much like the point of interest option.
In real use, I’d say these aren’t Garmin level, but I found them functional to expectations. The Dunkin’ route did fail to calculate the first time I tried it so it could take some trial and error. I’ve also seen some reports online that this can be very regional, with some of the functions struggling with avoiding intersections and even crossing highways when not needed. Fortunately, the two parks and running green ways I attempted hikes on worked fine for me.
The Amazfit T-Rex 3 Pro makes a powerful case for a rugged adventure watch by pairing a premium titanium and sapphire build with an ultra-bright display and complex features like free, routable offline maps. At just $399, it offers a compelling value proposition that directly challenges the high-end offerings from competitors like Garmin.
Fitness
The T-Rex 3 Pro is ready for action, offering an incredible amount of over 187 activity profiles to choose from. This includes not only basics like running, cycling, and triathlon mode, but also highly niche categories such as square dancing, belly dancing, chess, and checkers. The user forums also suggest they are actively working on a rucking profile that would fit right in for the user the T-Rex 3 Pro is targeting.
Another key addition compared to the non-Pro model is the inclusion of a profile for recreational scuba diving, where the original was limited only to free diving. The Pro features 10 ATM water resistance. The scuba diving feature is intended for recreational purposes only and comes with an intimidating disclaimer advising against relying solely on the device for decompression or no-fly decisions.
Under the hood, the watch utilizes the same BioTracker 6.0 PPG optical heart rate sensor found in the T-Rex 3. I found the accuracy of this sensor to be solid, although individual results may vary. It’s worth a note hhe sensor supports skin temperature detection and SPO2 detection (blood oxygen), but it lacks an ECG (electrocardiogram) feature.
I have zero complaints as a fitness watch from the T-Rex 3 Pro. Much like the previous AmazFit’s recently, I found the tracking accurate and the watch comfortable to wear. The Zepp app is one of the most insightful as well, offering some of the most relevant AI evaluations of your readiness and fatigue based off recent activities.
Battery Life
The battery life on the T-Rex 3 Pro remains impressive, but the specifications have actually decreased slightly compared to the original T-Rex 3. This reduction is attributed to the brighter display, the built-in speaker and microphone, and simply doing more complex processing, but the company still claims a max of up to 25 days away from the charger.
Obviously, that’s subjective, and my normal usage tends to average two to four workouts a week and a few days of about an hour of GPS. During my testing. This is Always On display turned off but notifications syncing and full sleep detection as well. With all that considered, I got round 18 days of battery per charge.
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At its price it’s a steal when compared to the more rugged Garmin options with similar runtimes. When you do need to charge, though, you do need a minute. While I love the charger design with a strong magnet and pogo pins powered by USB-C, it’s just slow. A full recharge takes around two hours.
Final Thoughts
At $399, the Amazfit T-Rex 3 Pro offers a fantastic value proposition. You are getting a premium package that includes a sapphire display, titanium components, an incredibly bright screen, a highly useful built-in flashlight, and highly complex features like routable offline mapping. For those who find the price point of competitor lines like the Garmin Fenix intimidating, the T-Rex 3 Pro should be near the top of the list.Â
