Amazfit T-Rex Pro review

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Huami (soon renamed as Zepp) recently announced its latest rugged smartwatch with the Amazfit T-Rex Pro. Being a Pro upgrade to the original Amazfit T-Rex, which we reviewed in detail last year, the new edition brings 10ATM water resistance (compared to 5 ATM on the old model) and Huami’s self-developed BioTracker PPG 2 optical sensor. Other than that, you get a slightly tweaked software experience in the same rugged military-grade design as before.

This means excellent 1.3 “AMOLED with Always-On Display functionality, built-in GPS and tracking for over 100 sports and activities. There is the usual range of health tracking features that monitor your heart rate, blood oxygen saturation, sleep and stress. Are the upgrades enough? to justify the $ 180 / € 170 / INR 12,999 price when the OG T-Rex is still available for far less? Let’s find out in our Amazfit T-Rex Pro review.

Amazfit T-Rex Pro specifications

  • Body: 47.7 x 47.7 x 13.5 mm, 59 g (with strap), non-standard strap; 10 ATM water resistance (supports swimming) and STD-MIL-810G certification; Tempered glass + oleophobic coating; Polymer housing, metal buttons
  • Screen: 1.3 “AMOLED, resolution 360 x 360 pixels, supports the AOD dial
  • YOU: Proprietary; Support for Android 5.0 and later, iOS 10.0 and later
  • Battery: 390mAh (18 days of typical use, 66 days of basic clock mode, 40 hours of continuous GPS tracking)
  • Connection: Bluetooth 5.0 + BLE; GPS + GLONASS
  • Various: BioTracker 2 PPG biological tracking optical sensor, 3-axis acceleration sensor, 3-axis gyroscope sensor, geomagnetic sensor, ambient light sensor, barometric altimeter

Design

We got the new steel blue color for our review as well as the sneakier Meteorite Black option. Both watches come with red accents on the case, and the two dark colors make them quite versatile to suit your style needs.

Amazfit T-Rex Pro review

The housing is made of plastic and has a metal spray coating on the outer edge. The four navigation buttons (yes four) are made of metal and are a really useful way to control your watch without smearing the screen. You can walk around the interface, pick items, and go back while operating the watch with your gloves if you happen to be skiing or by the pool trying to finish your swims. Button feedback is not the best out there and leaves a lot to be desired.

Amazfit T-Rex Pro review

As a rugged smartwatch, the T-Rex Pro comes with 15 MIL-STD-810G certifications. These include shock resistance, certified function in environments with weather from -40 degrees Celsius up to + 70 degrees Celsius. The watch is also able to withstand ice and icy rain.

One of the big new additions of the Pro is 10ATM water resistance, up from 5ATM on the original Amazfit T-Rex. This means that you can immerse the watch in water up to 100 meters. Not that it’s something you would normally do unless you’re an advanced diver.

Despite its clumsy appearance, the T-Rex Pro fits really well even on smaller wrists and is comfortable to wear around the clock. The watch weighs 60 grams and the silicone strap feels well made, while at the same time being quite breathable.

Amazfit T-Rex Pro review

The look is subjective, but I actually enjoy the rugged design of the T-Rex Pro and appreciate the feeling of not constantly having to worry about unintentional dents or liquids getting in the way.

Screen

The 1.3 “AMOLED screen on the T-Rex Pro is light, vibrant and sharp. In terms of size, I find the T-Rex Pro’s screen to be the optimal middle ground for ease of use and touch input, while not sitting like a water meter on your wrist , as some larger watches tend to do.

Text and icons were always sharp, and even the more complicated dials still looked good from all angles and viewing distances. Always-On Display (AOD) is a nice feature to have, just like the automatic brightness control. Touch responsiveness was in place and I did not experience any issues with unregistered faucets. Brightness output was good enough, but certainly not class leading.

Amazfit T-Rex Pro review

The raised outer edge of the T-Rex Pro managed to protect the screen quite well in my test. I did not go out of my way to test its durability, although I can confidently say that the surviving occasional dick on door handles and other hard surfaces with display glass remains scratch-free.

Software

As with most smart wearables, the T-Rex Pro requires a phone companion app to set up and customize. The Zepp app supports both Android and iOS phones and has all the control and detailed graphics for health data you will ever need. It can be synced with WeChat, Google Fit, Strava and Relive for cross-referencing your health and fitness data.

Amazfit T-Rex Pro review

Operation of the T-Rex Pro is done either through swipes on the touch screen or through the four physical buttons. You can wake up the watch by pressing one of the four buttons and fully operate the interface in all areas without touching the screen, which is really useful when wearing gloves or just when your hands are dirty.

The new version of Amazfit’s custom clock user interface on the T-Rex Pro includes some small improvements over the original T-Rex. A swipe down from the home screen takes you to the reorganized quick settings switch. You will find controls for screen brightness, phone finder, battery saver and Do Not Disturb mode, as well as a quick switch to the clock settings menu. You get information about battery, weather and connection just above the seven switches.

Amazfit T-Rex Pro interface

Amazfit T-Rex Pro interface

A new addition to the T-Rex Pro is the map activities and health section, which you can access by swiping up on the home screen. It is a one-stop-shop that combines the most useful features of the watch in the form of widgets. You get access to your daily activity statistics, PAI score, weather information, heart rate, SpO2 monitoring and maximum oxygen uptake. The last three can be measured directly from their respective maps without the need to enter a separate screen or submenu.

Amazfit T-Rex Pro review

The software experience on the T-Rex Pro is certainly usable, and the Zepp app provides plenty of detailed metrics for workout and health tracking data. Navigating the user interface is fast and fluid, and I did not encounter any app crashes or hiccups in my test.

My main gripe is the messaging system, which is limiting in scope and usability. You only get a text bubble with no way to respond, and most app icons do not appear fully on the watch, making it difficult to see which app needs attention. In addition, you are not able to clear notifications individually and are presented only with the option to delete all incoming alarms.

Another failure is that you can not access any of the apps on the watch once you have started a workout. There is no way to control music or manage incoming messages, which would definitely be a useful addition with a future software update.

Amazfit T-Rex Pro review

The dial selection is solid and there are plenty of options to suit your style, from sleek analog options to functional sporty styles. You can also create your own dial with any image inside the Zepp phone app, though these only show time and date, which is quite restrictive. There is also the solution of the AmazFaces app that allows for the endless dial customization, although these options can greatly limit the battery life.

Features and performance

On the health tracking side, we have the BioTracker 2 PPG optical sensor, which was also present on the Amazfit GTR 2 series and promises to provide more accurate readings for heart rate and SpO2 data as well as improved automatic training detection. The T-Rex Pro also supports GPS, GLONASS, Galileo and BeiDou satellite positioning to help you track your training routes accurately.

Automatic training detection was almost non-existent in my test. During gym sessions, the watch could not recognize exactly when I switched between sets that also messed with the overall training intensity measurements. On the other hand, the sports and activity tracking selection is among the most varied I have seen to date with over 100 options to choose from.

Amazfit T-Rex Pro review

GPS locked about 5-10 seconds after I started my workout and kept a reliable and strong signal throughout my time using it. In terms of GPS accuracy, it is still not on par with a smartphone receiver. As an example, the data I recorded from a trip with GPS info from the T-Rex Pro was consistently turned off by 10-20 meters from my current location. The clock would also draw random lines if I changed direction.

Zepp app and training data metrics with GPS
Zepp app and training data metrics with GPS
Zepp app and training data metrics with GPS
Zepp app and training data metrics with GPS

Zepp app and training data metrics with GPS

Pulse results were on par with other wearables from the Amazfit brand such as the Amazfit GTS 2, which also has the same BioTracker 2 PPG optical sensor. Blood Oxygen Saturation (SpO2) monitoring from the tracker is on par with previous Amazfit wearables and trackers from other brands. It is a useful feature especially in the times we live in right now, although it does not fit a dedicated pulse oximeter that gives you more accurate and consistent readings.

Amazfit T-Rex Pro review

Sleep tracking was helpful, but not as accurate in my test. For example, the clock suddenly decided one night while I was laying on my trainer that I was asleep and even had myself in deep sleep for well over 20 minutes, which was certainly not the case. Most days, my falling asleep and waking up were added correctly.

Sleep tracking data
Sleep tracking data
Sleep tracking data
Sleep tracking data

Sleep tracking data

It was cool to see your sleep distribution, although I’m still not convinced that this data is of meaningful value. It would also be helpful to have a couple of sleep data metrics on the watch itself instead of having to go into the Zepp app every time.

Battery life

My T-Rex setup included the standard dial with AOD enabled and brightness set to automatic. Screen timeout was set to the lowest (5 seconds), and heart rate tracking ran at one-minute intervals throughout the day. I also had automatic sleep tracking and stress monitoring. I would push at least 20 minutes of walking a day and three workout programs on weekdays.

Amazfit T-Rex Pro review

With these exact settings, the T-Rex Pro would last me for 5 days and usually started day six with approximately 10% battery life. Charging time was about an hour (1 hour and 4 minutes) from almost empty to 100%, which falls in line with what I have seen from competing watches.

Dom

The Amazfit T-Rex Pro marks many checkboxes for an affordable rugged smartwatch. It brings a solid, yet lightweight build, decently equipped spec list and delivers respectable battery life. It’s hard to find a similarly built smartwatch under $ 200 / € 200, and this places the T-Rex Pro in a class of its own. Upgrading from the original T-Rex does not seem like a real consideration though, as the new additions to the Pro are not as worthy.

Despite its OS limitations, questionable GPS and sleep tracking performance, the T-Rex Pro deserves your consideration if you are looking for a skilled smartwatch that is not afraid of extreme environments and can take a fall, bruises and even a deep dive underwater .

Amazfit T-Rex Pro review

With its comfortable fit, skilled specification sheets and detailed sports tracking measurements, the Amazfit T-Rex Pro brings a balanced smartwatch offering to suit most casual users. The small compromises in software and tracking accuracy are easy to use and do not prevent the solid foundation on which the T-Rex Pro is built.

Advantage

  • Great build quality
  • MIL-STD-810G certified
  • Live AMOLED screen
  • Detailed training data metrics and 100+ sports modes
  • Fixed battery life

Disadvantages

  • Subpar GPS tracking
  • Doubtful sleep tracking
  • Limited operating system without third-party apps
  • Automatic training detection is deficient
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