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Amazfit T-Rex 3 Pro: One minute review
Amazfit has been on a hot streak recently. Fresh off the release of the Bip 6 and Active 2, the company has now released the latest version of its most capable outdoor watch, the Amazfit T-Rex 3 Pro. The watch is showcased by the super successful ultrarunner and official commercial partner Ruth Croft, who says that Amazfit “gives her the tools she needs without getting in the way of the run.”
With a military-grade (MIL-STD-810H) rating, a titanium bezel, and sapphire crystal glass, the T-Rex 3 Pro is seriously rugged, built to withstand extreme temperatures and is 10 ATM water-resistant, certified for scuba diving up to 45 meters. In addition to its already excellent diving features, the T-Rex 3 Pro has a dedicated dive computer mode like the Garmin Fenix 8 and Apple Watch Ultra 3.
The 1.5-inch AMOLED display is also impressively specced, with 3,000 nits of peak brightness to compete with the latest crop of Apple Watches. Beyond that, the watch offers up to 25 days of typical use on a single charge, a very good feat considering Garmin’s battery lives have been creeping downwards. When tracking outdoor activities, it still delivers up to 38 hours of continuous, high-accuracy dual-band GPS (which connects to six satellite systems). This endurance sets it apart and makes it ideal for multi-day treks or ultra-races.
The main trade-off is the software. It runs on Amazfit’s proprietary Zepp OS. While Zepp OS is smooth, fast, and feature-rich for health and fitness tracking, it operates on a closed ecosystem. This means there are no major third-party apps, including Spotify, Google Maps, or Strava. There’s a lot to commend the T-Rex 3 Pro, but this lack of integration is its most egregious downside.
(Image credit: Future / Paul Hatton)Amazfit T-Rex 3 Pro at Amazon for $399.99Amazfit T-Rex 3 Pro: Price and availability$399 USD / £399 UK / $600 AUSIncredibly affordable given its rugged qualitiesCellular connectivity will require upgrading to a more expensive smartwatch
At sub-$400 / £400 / $600 AUS, the T-Rex 3 Pro is an incredibly affordable alternative to the more expensive Garmin Fenix 8 and Apple Watch Ultra 3 (the Ultra 3 costs $799 in the US, so the T-Rex 3 Pro is fully half the price). It’s missing a number of features, including ECG support, crash detection, third-party apps and other integrations. If you’re not concerned about this, then the T-Rex 3 Pro delivers an awful lot of smartwatch for not a lot of money.
Value score 5/5
Amazfit T-Rex 3 Pro: DesignRugged and premium buildHigh-end AMOLED displayTwo size options
The Amazfit T-Rex 3 Pro is a rugged and outdoors-focused smartwatch that embraces a deliberately chunky and robust aesthetic. You could even call it a delightful homage to the classic digital sports watch, the Casio G-Shock.
The overall design aesthetic is probably more reminiscent of the Garmin Fenix 8 series, with both watches boasting circular, rugged designs and a blend of physical buttons (four on the Amazfit, five on the Garmin) and touchscreen operation. Personally I don’t think you can beat the tactile experience of physical buttons.
The fiber-reinforced polymer case is combined with a Grade 5 titanium bezel and buttons for a tough yet lightweight construction. The case contains a high-resolution 1.5-inch AMOLED display that is capable of an impressive 3,000 nits. As a result, I had absolutely no problems using it out in direct sunlight. The display is inset slightly and protected by scratch-resistant sapphire glass.
(Image credit: Future / Paul Hatton)
In addition to everything you’d expect from a typical smartwatch, the T-Rex 3 Pro features a built-in LED flashlight located at the top of the case, just like the best Garmin watches. This offers adjustable brightness and a dual-color mode, with the red light designed to preserve night vision during camping or late-night navigation.
While the T-Rex line used to be one-size-fits-all, and that size was huge, the Pro 3 introduces a second option. As a result, you can now choose from the original 48mm model (tested and photographed) and a more compact alternative 44mm model. The latter retains the rugged titanium/polymer build but fits much better on smaller wrists or under jacket sleeves.
Design Score: 4/5
Amazfit T-Rex 3 Pro: Features180 sports modes including skiing10ATM water resistanceNFC enabled
The Amazfit T-Rex 3 Pro offers an extensive set of features covering over 180 sports but with a distinct leaning towards more adventurous activities, including skiing and snowshoeing. The ski mapping feature enables users to find their nearest ski resort and navigate with detailed maps. According to Amazfit, these maps include “cable cars, color-coded slopes, and clear route guidance for groomed runs as well as off-piste, backcountry, or telemark routes.”
While taking part in icy-cold endeavors you’ll be glad to know that the T-Rex 3 Pro is resistant to temperatures as low as -40℃ and includes a smart Low Temperature Mode that keeps vital software functions of the watch operational in environments as cold as -30℃.
(Image credit: Future / Paul Hatton)
If you’re planning on showing the water who’s boss, then the 10 ATM water-resistance capabilities will come in handy. That means the watch is certified for diving to a depth of 45m and therefore ready for all your freediving and scuba diving excursions.
Tracking is taken care of by the new BioTracker sensor that delivers highly accurate heart-rate tracking even in challenging outdoor conditions. For pro-grade precision, the watch can also be paired with an Amazfit Helio Strap.
When you fancy a coffee or high-protein shake while on the slopes or on a long run, the inclusion of Zepp Pay takes advantage of NFC technology so you don’t need to go rifling through your stuff in search of your phone or bank card. Up to eight bank cards can be stored with password-protected contactless payment, keeping your transactions secure.
Features Score: 4/5
Amazfit T-Rex 3 Pro: PerformanceExcellent health and activity trackingFantastic battery lifePoorly implemented AI assistant
The T-Rex 3 Pro performs well when it comes to health and fitness tracking. I tested it alongside the more expensive and trusted Huawei Watch Ultimate 2 and found it reported very similar health metrics, including measuring heart rate to within a single beat. It also measured the same 96 percent reading for blood oxygen, which is very impressive considering the Watch Ultimate 2 features a dedicated X-Tap sensor for accurate readings.
I used my normal cycle route to test the GPS accuracy of the T-Rex Pro. This route includes both rural and built-up environments, which makes it an ideal test for GPS performance. GPS locking was almost instant, even when still in my house. GPS lock was maintained throughout the 4km ride, with no dropouts experienced. I compared the distance on both the Huawei Watch Ultimate 2 and onthegomap.com and found that the watch was within an impressive 50m of both, a statistically insignificant 1.25% difference.
The watch also delivers exceptional battery performance, lasting 9 to 10 days in my testing even with the Always-On Display and continuous health tracking active, which would qualify as ‘heavy use’. For those prioritizing longevity, disabling the AOD stretches performance to nearly 3 weeks. During high-accuracy GPS tracking, the battery proves its rugged credentials by draining only about 3% per hour, making it a reliable companion for multi-day adventures.
(Image credit: Future / Paul Hatton)
I’ve tested a few Amazfit watches now but haven’t yet delved deep into the Zepp Flow AI functionality. Getting hold of the T-Rex 3 Pro provided the ideal opportunity to change that. Zepp Flow is a conversational AI assistant and one of the first tools of its kind for smartwatches. I’ve always found navigating through smartwatch menus a bit laborious, and so I was eager to see if Amazfit was able to deliver a more intuitive hands-free experience.
After checking online for some of the commonly accepted commands, I began by saying, “I want to go for a run.” Zepp Flow recognised my words perfectly and immediately launched the run activity. There was no need to select “Go” as the activity began straight away. With my impressed face on, I then asked Zepp Flow if it will rain this afternoon. The watch responded with “I cannot provide weather information for past times” even though it was only 1.30pm.
A little more unsure than I was after launching the run activity, I set about seeing if Zepp Flow could help me access the watch’s smart features. I therefore gave the device access to my contacts and asked it to call my wife. Unfortunately, it kept thinking that I was saying Hutton rather than Hatton. I understand that these misunderstandings can happen, but rather than asking me to say it again or “Did you mean Hutton” it just stopped listening, end of conversation.
I find that if my experience of an AI assistant stutters a few times, then I quickly stop using it, and that was very much the case with Zepp Flow. Alongside a lack of third-party apps, I was left a little disappointed by the limited smartwatch features on offer.
Performance score: 4/5
(Image credit: Future / Paul Hatton)Amazfit T-Rex 3 Pro: ScorecardSwipe to scroll horizontally
Category
Comment
Score
Value
At this price point it doesn’t get much better than this.
5/5
Design
A solid titanium-built case featuring a 3,000-nit display and pro-dive durability.
4/5
Features
A set of impressive features aimed at outdoor enthusiasts and adventurers.
4/5
Performance
Highly accurate health and fitness tracking, but Zepp Flow lets the watch down.
4/5
(Image credit: Future / Paul Hatton)Amazfit T-Rex 3 Pro: Should I buy?Buy it if…Don’t buy it if…Also considerHow I tested
During my month-long testing of the T-Rex 3 Pro, I took part in a range of different activities, including cycling, running, football, aerobics, and more. Unfortunately I didn’t have a skiing holiday planned during the testing phase, so I wasn’t able to try out the dedicated skiing features. There were plenty of other features to keep me occupied, though, including health tracking, water resistance, Zepp Flow, messaging, and battery life.
First reviewed: February 2026
Amazfit T-Rex 3 Pro: Price Comparison