Image source: Zepp Health

Amazfit T-Rex 2 vs T-Rex Pro: What’s the difference?

Apple might be working on a rugged version of its watch but a few brands already have their own iterations of the same. One of these is Huami, or Zepp Health as it is known internationally.

Its Amazfit T-Rex is a durable watch made for the outdoorsy types. The original iteration was unveiled a couple of years ago. It packs a lot into a design that can take quite a beating. The company has followed that up with a Pro version about a year ago. Today we have learned of Amazfit T-Rex 2 which comes with some handy upgrades.

Essential readingTop fitness trackers and health gadgets

What exactly is the difference between the three iterations of this watch? Read on to find out.


Amazfit T-Rex 2 vs T-Rex Pro: Design and hardware

You can try and find differences in looks between the three generations, but it is not that simple. They all have pretty much the same dimensions and the same design. The build is a high-strength polymer that protects against drops, shocks and weather elements. Despite this the watch is lightweight weighing around 60 grams without the strap.

There are a few colour options available for T-Rex Pro which include Meteorite Black, Desert Grey and Steel Blue colours. The non-pro version comes in Rock Black, Army Green, Gun Grey, Came Green and Khaki. The outer bezel on Pro has a metal-spray giving it a slightly more premium appearance. The strap is also a bit fancier.

The Amazfit T-Rex 2, once again, mixes the colours around a bit. It comes in a choice between Astro Black, Astro Gold, Wild Green, Desert Khaki, Classic Black.

Here are the three watches side-by-side. Can you spot the differences? It really is hard to tell them apart.

Amazfit T-Rex comparison
Amazfit T-Rex 2 vs T-Rex Pro vs T-Rex

One important difference which might not be evident from the image above is the display size. T-Rex 2 packs a 1.39 inch HD AMOLED with a resolution of 454 x 454 pixels. The other two have a 1.39 inch AMOLED with a resolution of 360 x 360. So this is an important upgrade as it makes it easier to monitor your data whilst on the move. In all cases, the display is protected by Corning Gorilla Glass 3 plus there’s an anti-fingerprint coating.

These watches are built to last. This is best illustrated by the number of US Military grade certifications. The first generation passed 12 of them, the second and third 15. We’re not really sure what the 3 extra ones are, but does it really matter? The watches will definitely not disappoint when it comes to durability and rugged build.

For example, they can withstand environments like extreme cold (-40 C) to extreme hot weather (+70 C). It doesn’t matter if you are in a heat wave, humid rainforest or on a polar glacier – your watch should survive!

One more improvement over the original is that Pro and T-Rex 2 have a 10 ATM water-resistance rating, which means they can withstand depths down to 100 meters. That is double the 5 ATM water resistance of the first generation.

Amazfit T-Rex 2
Amazfit T-Rex 2 | Image source: Zepp Health

Under the hood

A few more differences can be found under the hood.

The duo shares the Huami BioTracker. Of course, the latest generation has the most up-to-date version. This consists of six photodiodes and is capable of tracking everything from heart rate, to blood-oxygen and stress levels. The first generation misses out on some of these, but more about that later.

Beyond that you also get a geomagnetic sensor, barometric altimeter and compass. This combination of sensors allows for most things you’d expect from an outdoorsy sports watch.

Satellite connectivity is also important for an outdoorsy watch. The first generation can tap into GPS and GLONASS. This was upgraded to four global navigation satellite systems (GPS, GLONASS, BeiDou, Galileo) on the second. The third gets dual-band five satellite positioning allowing for faster search speed and more precise positioning.

Despite packing a lot of tech under the hood, the T-Rex range does not need charging often. The first two generations are good for about 20 days before needing a top-up. T-Rex 2 can keep going an extra four days longer.

Here’s a table showing how the devices compare in terms of general specs and design.

T-Rex 2
T-Rex Pro
T-Rex
Case material
High-strength polymer body. Silicone wristband.
High-strength polymer body. Metallic painting on the watch. Two-tone silicone wristband.
High-strength polymer body. Silicone wristband.
Size
47.1 x 47.1 x 13.5mm
47.7 x 47.7 x 13.5 mm
47.7 x 47.7 x 13.5 mm
Military grade certifications
15 military grade certifications
15 military grade certifications
12 military grade certifications
Display type
AMOLED Screen, 454 x 454 resolution, Corning Gorilla Glass 3 + anti-fingerprint coating
AMOLED Screen, 360 x 360 resolution, Corning Gorilla Glass 3 + anti-fingerprint coating
AMOLED Screen, 360 x 360 resolution, Corning Gorilla Glass 3 + anti-fingerprint coating
Screen size
1.39 inch
1.3 inch
1.3 inch
Weight
66.5 grams
59 grams
58 grams
Sensors
BioTracker 3 PPG biological tracking optical sensor, 3-axis acceleration sensor, 3-axis gyroscope, Geomagnetic sensor, Barometric altimeter, Compass Ambient light sensor
BioTracker 2 PPG biological tracking optical sensor, 3-axis acceleration sensor, 3-axis gyroscope, Geomagnetic sensor, Barometric altimeter, Compass, Ambient light sensor
BioTracker PPG biological tracking optical sensor, 3-axis acceleration sensor, Geomagnetic sensor, Compass, Ambient light sensor
Water-resistance
10 ATM
10 ATM
5 ATM
Positioning
Dual-band 5 satellite positioning
GPS, GLONASS/GPS, BeDou/GPS, Galileo
GPS+GLONASS
Battery type
500mAh LiPo, Magnetic, 2pin pogo pin charging
390mAh LiPo, Magnetic, 2pin pogo pin charging
390mAh LiPo, Magnetic, 2pin pogo pin charging
Battery life
24 days in normal mode.
18 days in normal mode, 40 hours with GPS switched on.
20 days in normal mode, 20 hours with GPS switched on.
Colors
Astro Black, Astro Gold, Wild Green, Desert Khaki, Classic Black.
Meteorite Black, Desert Grey and Steel Blue
Rock Black, Army Green, Gun Grey, Camo Green and Khaki.
Typical RRP
starting at $229.99
starting at $179.99
starting at $139.99

Amazfit T-Rex 2 vs T-Rex Pro: Features

The Amazfit T-Rex is a great outdoorsy watch, particularly when you take its price into consideration. It offers a lot for the money. The timepiece represents a good alternative for those that do not want to pay an arm and a leg for a Garmin.

As far as fitness and activity tracking, you get all the basics including the ability to track multiple different sports. All of this works via Huami’s proprietary operating system which is easy to navigate and operates smoothly.

The Pro version builds on the original with some new functionality. For starters, users can now track more than 100 sports versus the original 14. These include a host of popular outdoor sports modes. Something called ExerSense is also new. It automatically detects and tracks eight sports modes in case you forget to switch them on yourself.

Amazfit T-Rex 2 vs T-Rex Pro

Amazfit T-Rex Pro
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Amazfit T-Rex Pro

Interestingly, Firstbeat metrics made an appearance on Pro. This includes VO2Max, Training Load and Recovery info. We are big fans of these types of metrics and are hoping to see more of them on Amazfit watches.

Amazfit T-Rex 2 builds on this with support for over 150 sports. The new device supports hikers, climbers, trail runners and adventurers to explore unfamiliar terrain through its route trajectory navigation, real-time navigation and journey tracking functions.

It also uses direct-return navigation to show the shortest straight line back to the start of a journey. With the new route import function, users can import pre-selected routes and follow them using the watch.

Amazfit T-Rex 2
Image source: Zepp Health

The satellite positioning should be better with each subsequent generation. This is particularly the case with the third which supports dual-band five satellite positioning. That should allow it to track positioning in more complicated conditions and out-of-the-way environments.

The final differences between the generations are to do with Huami’s BioTracker PPG biological tracking optical sensor. The original has the first version so misses out on blood oxygen tracking and stress monitoring. All of this is present on T-Rex Pro and T-Rex 2. The latter also has one-tap measuring which spits out four different health metrics (heart rate, blood oxygen saturation, stress level, breathing rate) in as little as 45 seconds.

T-Rex 2
T-Rex Pro
T-Rex
SpO2
Yes
Yes
No
Heart rate monitoring
BioTracker 3 PPG biological tracking optical sensor
BioTracker 2 PPG biological tracking optical sensor
BioTracker PPG biological tracking optical sensor
Stress monitoring
Yes
Yes
No
Sports modes
150+
100+
14
Altimeter measurement
Yes
Yes
No
Firstbeat-type metrics
Yes
Yes
No
Route-import function
Yes
No
No

Amazfit T-Rex 2 vs T-Rex Pro vs T-Rex: Verdict

The T-Rex is an excellent military-style watch. You’ll struggle to find a similar device that offers so much for the price. A great alternative to a costly Garmin. If you are into lots of outdoor activities and rugged environments, it is certainly a timepiece worth considering.

If you are still holding on to the first generation, it might be time to upgrade. But probably not if you have the Pro.

T-Rex 2 comes with a larger 1.39 inch, longer battery life, dual-band five satellite positioning and the same super-tough build while retaining the lightweight design. It has support for over 150 different sports and comes with some Firstbeat metrics sprinkled in.

Amazfit T-Rex 2 vs T-Rex Pro

Amazfit T-Rex 2
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Amazfit T-Rex Pro

If you are in the market for a new watch we always suggest going for the latest version (Amazon link). This version is more likely to benefit from future software updates, plus it has the latest sensors.

Having said that, the T-Rex Pro (Amazon link) will likely soon come down in price which will make it bargain. That one is also definitely worth checking out.

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2 thoughts on “Amazfit T-Rex 2 vs T-Rex Pro: What’s the difference?

  • Does the T-Rex2 have a touch screen?

    Reply
    • Yes, so does it predecessor.

      Reply

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