2020 Accessory Review Reviews Smartwatch Review

Amazfit T-Rex Watch Review

Smartwatches have been becoming increasingly popular alongside other wearables like fitness trackers. And while there have been some great smartwatches, one thing that seems to be a point that is overlooked is battery life.

Most smartwatches will last a couple of days on a charge (while Apple seems to still think 18 hours/a day of battery life is still okay for the Apple Watch) while companies such as Amazfit are doubling down on battery life by offering up to 20 days with their T-Rex watch.

Design & Hardware

On the outside, the Amazfit T-Rex takes inspiration from Casio’s G-Shock watches but while the looks big, the watch is actually fairly lightweight at just 58g. The body of the watch is made from Polymer materials which make it lighter.

The rugged exterior of the T-Rex isn’t just to look good, it actually has 12 military-grade certifications including:

  • 70-degrees Celsius Heat Resistance
  • -40-degrees Celsius Cold Resistance
  • 240h Humidity resistance
  • 96h Salt Spray resistance

In addition to the military certifications, the watch 5ATM waterproof and can be used for swimming. Inside there’s a BioTrackerTM PPG Bio-Tracking Optical Sensor, 3-axis acceleration sensor, Geomagnetic sensor and an Ambient light sensor.

The Amazfit T-Rex has a 1.3-inch AMOLED display with a resolution of 360 x 360 and Corning Gorilla Glass 3. There’s also Bluetooth 5.0 (with Bluetooth Low Energy), GPS & GLONASS.

The back of the watch, you’ll find the heart rate monitor (which I found to be somewhat accurate) and magnetic 2-pin pogo pin charging contacts. In terms of battery life, the Amazfit T-Rex has a 390mAh battery which lasts up to 20 days with heart rate monitoring on and daily use.

The watch can last even longer in basic watch mode at up to 66 days that disconnects from your phone and heart rate monitoring off. The last mode is GPS Continuous which lasts around 20 hours.

In my testing, I was able to get the advertised 20 days of battery life which is great for a smartwatch. Most other smartwatches with a touchscreen last less than one week. Because of the long battery life, the T-Rex can track your sleep.

The Amazfit T-Rex comes in a number of colours including Rock Black, Gun Grey, Camo Green, Khaki and Army Green.

One downside to the Amazfit T-Rex is its availability. It’s hard to find the watch available for purchase in Canada. You won’t be able to pick it up from Best Buy Canada but it is available from Amazon from some sellers.

Here’s where you can buy the Amazfit T-Rex in Canada:

The MSRP for the watch is around $150 USD (about $200 CAD).


The software side of the T-Rex is where things start to go downhill. To start using the watch, you’ll need to connect the watch using the Amazfit app on Android or iOS (Android 5.0 or iOS 10.0 and above).

Once you install the app, you’ll be asked to create an Amazfit account. When I first set up the app and tried to go through the process to create an account, it would let me create my account but then it wouldn’t let me log in to the app.

That’s because when I was trying to sign in, Amazfit was having some server issues at the time. This was resolved after a few hours and it’s possible you may experience this as well.

The actual interface on the watch is fairly straightforward. The main screen shows you your watchface. Swiping up one gets you to the steps taken, swipe again shows your heart rate and swiping once more brings you to the quick settings panel.

The buttons on the left side of the watch labelled Up and Down will let you navigate through the watch’s interface without using the touchscreen. For watchfaces, there’s no way to install third-party watchfaces without a workaround or another app or two.

The Amazfit app lets you choose from around 30 watchfaces. From the watch itself, you can switch between three of them by holding down on the main screen and swiping between them.

Swiping to the left on the main screen brings you to your notifications, swiping to the right on the watchface screen shows your different settings on the watch like workout, weather, alarms, settings etc.

One thing about the notifications is that they can be hit or miss. I’ve noticed for some notifications like WhatsApp or Facebook Messenger, it won’t show the actual message. Instead, it will just say “Messenger: New message, view it on phone.”

The Amazfit app has three distinct areas, Homepage, Enjoy and Profile. The Homepage shows you things like your current steps taken, heart rate, PAI (basically activity points), Sleep score, Goal tracker and other health data like BMI, muscle mass, water intake etc. On the same Homescreen, there’s a swipe up menu that has some quick settings like Running, Walking, Incoming Call and more.

The Enjoy screen lets you adjust different settings of the watch such as Alarms, Events, Watch face, App alerts etc. Profile is pretty self-explanatory, it shows you your watch’s battery life and details about your account and more.

Final Thoughts

Overall, the Amazfit T-Rex is a good watch with super long battery life and health features you’d expect from the average smartwatch. 


  • Fitness and sleep tracking work well (and syncs with Google Fit)
  • Super long battery life (up to 20 days)
  • Good screen with limited always-on options
  • Rugged design


  • Setup process is a bit messy
  • Availability is limited in Canada
  • Notification support isn’t the best

By Sachin Bahal

Sachin is the editor-in-chief of TheCanadianTechie, a site he started in 2012 to become the ultimate, independent source for tech enthusiasts or “techies”. He is a versatile writer with a passion for technology and loves to write about gaming, entertainment, tech and more.

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