Amazfit T-Rex 3 Pro review: Flashy upgrade for a likeable outdoor smartwatch

Best Prices Today: Amazfit T-Rex 3 Pro

The Amazfit T-Rex 3 Pro is a smartwatch built for the outdoors that wants to show you don’t have to spend big on an Apple Watch Ultra 3 to get yourself a good trekking companion.

For a smaller spend than most of the competition, the upgraded T-Rex 3 features a brighter screen than the non-pro version, surrounded by new design materials, while offering features like free colour mapping, a flashlight and weeks as opposed to days of battery life.

The T-Rex has been a standout line for Zepp Health’s busy range of smartwatches. Does the T-Rex 3 Pro make big improvements on the 3 to make it worth the upgrade and one of the best mid-range outdoor smartwatches to buy? I’ve had it strapped to my wrist to find out.

Design & Build

• Comes in two case sizes
• Added sapphire glass and titanium
• Now suitable for scuba diving

While the T-Rex 3 Pro sticks to the same octagonal case look as the T-Rex 3, there are some changes. The main one is that it’s now available in either 48mm or 44mm case sizes. They cost the same and you can just expect different sized screens. The smaller model also offers a softer octagonal design compared to the 48mm model I tested.

Another new feature is one we’ve seen Garmin introduce to its smartwatches recently. That’s a built-in flashlight and not one that simply turns the watch screen into an added source of light. It’s located at the top of the watch case.

When activated in the quick settings menu on the watch you can adjust brightness settings with the physical buttons on the left side of the case. There’s the option of white or red colour lights and while it’s not quite as bright as Garmin’s built-in flashlight, it offers a useful way to keep you seen on evening outings.

The 48mm T-Rex 3 Pro is a touch thicker than the T-Rex 3 while moving to a bezel and physical buttons made from titanium. You’re still getting some tough metal with a little less overall weight to handle. For a big watch, it’s a pretty manageable one that’s never felt too hulking to wear.

The watch strap remains a 22mm-sized one, though crucially, it is now a bit easier to remove and replace. There’s a quick release mechanism that, while fiddly, does mean you can pop that strap out with the tool you needed for the T-Rex 3. The strap though, did have a tendency to feel a bit sticky under my wrist after workouts. It never made it uncomfortable to wear, but I’ve definitely worn nicer sporty silicone straps.

As this is a smartwatch fit for some rough and tumble, the Pro can operate in low temperatures and safely survive quite a deep dip.  It carries a 10 ATM waterproof rating, making it safe to be submerged in water up to a 100 metre depth. It’s also suitable for recreational diving up to 45 metres and is now fit for scuba diving to boost its water sports-friendly credentials.

Screen & Audio 

• Brighter screen than T-Rex 3
• Sapphire glass now included
• Added speaker for Bluetooth calls

The 48mm Pro features the same 1.5-inch, 480 x 480 resolution AMOLED touchscreen found on the regular T-Rex 3. It now swaps sapphire glass in place of Gorilla Glass to provide a nice upgrade in protection against scratches.

Sapphire glass is typically found on much more expensive outdoor watches. A more noticeable upgrade is the bump in overall screen brightness. This is a display with a peak brightness of 3,000 nits (up from 2,000 nits) to make an already very easy to view screen more viewable in challenging conditions.

Unlike the T-Rex 3, the Pro does now give you a speaker alongside a microphone. This enables Bluetooth calls, lets you hear updates during workouts and listen to music out loud – If you want to be one of those people.

The speaker certainly prioritises clarity and volume, which is fine by me and makes it far more suitable for calls than listening to music.

Software & Features 

• Runs on Zepp 5.0
• Contactless payment and music player included
• Mixed support for iOS and Android

The T-Rex 3 Pro runs on Zepp OS 5.0, the latest version of Zepp Health’s proprietary operating system. It doesn’t look all that different from Zepp OS 4.0, and is still compatible with both Android phones and iPhones. I’ve been using it mainly with an iPhone, where you’ll need to download the improved Zepp smartphone app to get things set up.

What you get in a smartwatch when you’re not tracking workouts is something that a good array of features. It simply doesn’t match what other smartwatches can offer.

Take a staple feature like notifications, where support for messaging apps, emails and other apps can vary. You can’t respond to notifications, nor will it pull through images like some other smartwatches can. 

If you look at features like contactless payments, adding membership cards or taking advantage of the Zepp Flow AI assistant, support can vary depending on the phone you’re pairing the Pro to. The biggest takeaway here is that not all users will necessarily get the exact same T-Rex 3 Pro experience. 

There is an app store and up to 26GB of room to store apps, watch faces, as well as audio and maps. Again, if you compare the Zepp app store to Apple’s or Google’s, it pales in comparison for the breadth of apps and the number of high-profile apps you’ll find.

Having used the T-Rex 3, I wouldn’t say the smartwatch experience has been all that different either. Having also used many other Amazfit smartwatches, the Pro similarly gives you enough smartwatch support and tries to tick off big features, but simply lacks the polish of its competitors. 

Fitness & Tracking 

• Free maps and turn-by-turn navigation 
• Over 180+ sports modes 
• Can pair external sensors

The remit for the Pro is the same as the regular T-Rex 3. Whether you’re a runner, hiker or love Hyrox, you should find a level of support to help you track and train with this watch for a range of sports.

There are all the kinds of things you’d expect to see from a fully-featured sports and outdoor watch. You have access to free colour maps, which are synced over to the watch from the Zepp app. There’s the ability to import and plan routes, and get routed back to your start point.

The mapping and navigation support works well, with maps loading and refreshing without major lag. You’ll need to use a mixture of the touchscreen and buttons to navigate maps and the combination of the two controls is well executed.

If you want it to track your workouts, there are 187 profiles included, with modes for tackling a triathlon and open water swims. This is one of the few watches where you’ll find dedicated Hyrox training and race modes.

It’s good to see there’s dual-band GPS support in tow, giving you the latest in positioning technology. You can also pair heart rate, running and cycling power meters for an additional hit of data. I’ve done runs, swims and a range of indoor workouts with it, and the performance on the Pro has been very solid. I would take the option of pairing an external heart rate sensor if you care about accurate heart rate data, but GPS performance and general activity tracking never felt lacking.

There are what Zepp Health deems as health features, but nothing here is designed to offer medical-grade insights. You can track heart rate continuously with a good degree of accuracy. Likewise, you can keep tabs on skin temperature and stress levels.

While it might be a bulky watch to take to bed, I found sleep tracking accuracy pretty reliable on most nights up against an Oura Ring 4, with metrics nicely presented on and off the watch. I would say Apple and Samsung particularly offer stronger sleep tracking, but you can get good data here.

There are training features and insights on offer too. You can build interval training workouts on the watch, with support to recognise a range of strength training movements. The Zepp Coach and PeakBeats training insights feel like features that are a work in progress. Zepp Health is definitely playing catch-up with what the likes of Garmin and Polar offer on this front.

What’s also important to mention here is that you can share data with major apps like Strava, RunKeeper and TrainingPeaks. If you’re not a big fan of looking at your stats in the Zepp app, you do have other options.

Battery Life & Charging

• Shorter battery than T-Rex 3
• Up to 10 days battery in heavy use
• Uses proprietary charging cable

There’s some good news and bad news on the battery front. The good news is that this is a watch that’s capable of running for a couple of weeks before you need to slap it onto the same proprietary charger used with the T-Rex 3.

The bad news is that the battery life numbers in general have reduced from the non-Pro T-Rex 3. Typical battery life is touted as 27 days, which is two days less than the T-Rex 3. The battery life in the most accurate GPS accuracy mode drops to 38 hours from 42 hours. Heavy usage battery life drops to 10 days from 13 days.

I found that whether I used more power-intensive features like the dual-band GPS, mapping and kept the now brighter display on at all times, I could still get over a week out of it. When I used the best GPS mode for an hour-long workout, the battery drop was 4-5%.

Compare that performance to other outdoor smartwatches, particularly the Apple Watch Ultra 3 and the Samsung Galaxy Watch Ultra, and the T-Rex 3 Pro still comfortably comes out on top. Even if the battery numbers in general seem to be trending in the other direction.

Price & Availability

The Amazfit T-Rex 3 Pro was officially announced on the 5th September 2025, which is a year after the launch of the T-Rex 3.

It’s been available since September through the Amazfit website and retailers, including Amazon and Argos in the UK.

The Pro name is your cue that it will cost more than the regular T-Rex 3, which currently sits at $279/£279. The T-Rex 3 Pro is priced at £399.90/$379, so that’s roughly a $100/£100 increase.

That still does mean it’s considerably cheaper than other outdoor smartwatches like the Apple Watch Ultra 3 (£799/$799), Samsung Galaxy Watch Ultra (£599/$649) and the Garmin Fenix 8 (from £949/$999).

Check out our list of the best smartwatches right now.

Should you buy the Amazfit T-Rex 3 Pro?

If you already own the Amazfit T-Rex 3, the biggest reasons to upgrade would be the built-in flashlight, the added titanium and a speaker. You also have the option of a smaller case size.

Functionally, the T-Rex 3 offers a similar overall tracking for less money and is definitely still worth looking at if you’re on a stricter budget. If you’re looking for a rugged smartwatch alternative to pricier options like the Apple Watch Ultra 3, the Samsung Galaxy Watch Ultra or Garmin’s Fenix series, there’s going to be plenty here for you to like in the T-Rex 3 Pro.

It does lack some of the nicer design elements of Apple and Samsung’s rugged watches, but it certainly makes up for it with a strong performance. If you’re an Android user looking for an affordable alternative to the Apple Watch Ultra, this is one to look at instead of the Samsung Galaxy Watch Ultra. If you can live without the much slicker smartwatch features available through Wear OS.

Specs

• 48mm case size
• 1.5-inch
• Titanium bezel and sapphire glass 
• Up to 3,000 nits brightness
• Waterproof up to 100 metres 
• Up to 25 days battery life
• 180+ sports modes
• Flashlight, speaker and microphone

Best Prices Today: Amazfit T-Rex 3 Pro