Huami Amazfit T-Rex: Amazfit’s first outdoor smartwatch

In addition to the Amazfit Bip S and also the first own TWS headphones, Huami introduced another new Smartwatch at CES: the Huami Amazfit T-Rex. This is a kind of outdoor Smartwatch, similar to the Casio G-Shock models.

Amazfit T-Rex at GearBest – Arrival Notice

Technical data of the Amazfit T-Rex

Amazfit T-Rex
Display 1.3″ AMOLED, 360 x 360 p, Gorilla Glass 3
Colors grey, black, camouflage, khaki
Battery 390 mAh LiPo, 20 days runtime
Connectivity Bluetooth 5, GPS + GLONASS
App Compatibility Android 5, iOS 10
Water resistance ATM 5
Dimensions | strap | weight 47.7 x 47.7 x 13.5 mm | 20 mm | 58 g

Amazfit T-Rex with robust design

At first glance, the Amazfit T-Rex looks very much like the G-Shock models, which also have a rugged design. The watch’s case frame appears very robust and is apparently made of a thick plastic. This is also emphasized by the thick, clearly visible screws around the bezel. In fact, the Amazfit T-Rex directly conforms to twelve military certifications, so that it can function in extreme temperatures ranging from -40°C to 70°C.

Amazfit T-Rex military certifications
According to the diagram, the watch should withstand a damp heat test for 240 h & a spray test with acid & lye for 96 h

However, it “only” corresponds to the ATM 5 classification. So you can shower and swim with it, but we expected more from an outdoor-watch. According to the ATM 20 classification you could also dive with it, the ATM 5 protection given here can also be found in a Mi Band 4 by Xiaomi. The watch case is made of a combination of plastic and metal elements, the strap is made of silicone. The watch is available in four different colors: black, gray, khaki and camouflage.


However, it remains true to the round watch design, making it very similar to the Amazfit GTR. However, it has a 1.3″ AMOLED display, which is exactly the same size as the two GTR versions. The resolution is 360 x 360 p, of course the watch also supports an always-on display. Of course most of the operation is done via the touchscreen, but the watch is also equipped with four function keys.


Like every Amazfit Smartwatch, Huami also installs an adapted operating system on the Amazfit T-Rex, which does not allow the subsequent installation of apps. Pre-installed are typical functions such as notifications, weather display, alarm clock, timer, countdown, sleep tracking, reminders or a call reminder. There are also a total of 14 sports modes, four more than the new Amazfit Bip S. In addition to various jogging modes, cycling and swimming, triathlon, skiing, climbing and fitness are also worth mentioning.

For this purpose, the BioTracker PPG heart rate monitor was integrated, which allows a permanent heart rate measurement, but of course can only measure when needed. For outdoor sports modes such as jogging, the Sony GPS chip is also interesting, which is combined with an additional positioning system. Amazfit has also probably worked on making the watch case more “GPS-friendly” so that a faster fix is now possible.

The manufacturer has integrated a 390 mAh battery, which allows an average runtime of 20 days. The usage for this is defined as follows: 150 notifications per day, look at the clock 30 times with raise to wake function, 5 minutes other usage per day and 30 minutes jogging every two days. If you use the clock exclusively as a watch and cut many functions as well as the connection to the mobile phone, then even 2 months of usage are included.


After several outdoor smartphones, outdoor smart watches are now logically coming onto the market. We had hoped for a little more from the Amazfit T-Rex than an Amazfit GTR that was trimmed for outdoor use. In my opinion, it is designed for athletes who are active outdoors a lot. Visually, I like the camouflage look in particular, but I would have liked better water protection and one or two specific outdoor applications on the watch. On the other hand, there are many sport modes, a good running time and hopefully an improved GPS integrated. What do you expect from the T-Rex and do you find outdoor smartwatches generally interesting?

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My special interests are smartphones from China and I am always keen to discover new smartphone accessories like smartwatches and headphones. 

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