Casio G-Squad Pro GSW H1000 v/s Amazfit T-Rex: Which one is the Best?

Casio recently launched its first WearOS powered smartwatch – the G-Squad GSW-H1000. The GSW-H1000 comes loaded with a variety of Google apps and services designed for the watch.

On the other hand, the Amazfit T-Rex is a nearly one-year-old popular rugged smartwatch. The all-new G-Squad is supposed to compete with the T-Rex in the market. So here, we’ll do a quick comparison of these two smart wearables.

Casio G-Squad Pro GSW H1000 v/s Amazfit T-Rex

It goes without saying that both smartwatches are good in their own way. Though T-Rex has been released a year or so ago, it does feature good specs capable enough to compete with the G-Squad. That made clear, let’s see how they stack up.

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Casio G-Squad Pro GSW H1000 v/s Amazfit T-Rex

TLDR: WearOS gives a substantial advantage to the G-SHOCK. However, the 12 military certifications bearing build quality makes the T-Rex a good gizmo for the outdoor fanatics.


The all-new Casio G-Squad has a so-called dual-display that combines a monochrome, always-on LCD for time display with a colour 1.2-inch LCD for high-definition display of maps, sensor data and more. This dual display enables optimal display options for your setting while maintaining excellent visibility at all times.

While Amazfit boasts a 1.3-Inch AMOLED Color Screen and features Always-On Display. Watch faces are customizable to meet your personal needs.

So, in terms of display, it’s all subjective. If you like AMOLED display, then go for Amazfit or if you’d like to have the additional features of Dual-display then Casio’s version will be the gadget to go.

Amazfit T-Rex Smartwatch, Military Standard Certified, Tough Body, GPS, 20-Day Battery Life, 1.3'' AMOLED Display, Water Resistant, 14-Sports Modes, Rock Black
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Amazfit T-Rex Smartwatch, Military Standard Certified, Tough Body, GPS, 20-Day Battery Life, 1.3'' AMOLED Display, Water Resistant, 14-Sports Modes, Rock Black
  • A military standard watch with 12 military...
  • Thanks to its rugged exteriors, this smartwatch...
  • Use it for upto 20 hours on a single charge! It...


The Amazfit T-Rex’s shape is a tough smartwatch with a solid build. Due to its amazing rugged body, it has obtained 12 Military Certifications. For outdoor smartwatches, robustness and reliability are particularly important and the T-Rex delivers both. The 12 military-grade certifications testify its robustness and resistance to harsh environments.

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Needless to say, the Casio G-SHOCK is also phenomenal in terms of build quality. Though no military certifications or as such, it features shock-resistant construction plus a water-resistant microphone and charging port. An optical sensor to measure heart rate at the wrist and a microphone also provides shock resistance and 20-bar water resistance.

So, in terms of build quality both are A+. You’ve to consider your comfort level before picking either one in this aspect.

Battery Life

The Amazfit comes with a 390mAh LiPo battery, which is rated to provide 20 days of Heart rate monitoring always on, sleep monitoring; GPS turned on for 13 minutes a day, 150 messages pushed daily which activate the screen, wrist raised 30 times which activate the screen, and 5 minutes of other operations in the Daily use mode. Which is pretty good battery life.

Whereas the G-SHOCK comes with a Li-ion battery Battery which is rated to offer up to a month if on the monochrome display and tracking sensors or about a day and a half if more frequent with the colour display.


The G-Squad Pro packs all the necessary fitness sensors seen in the modern smartwatches including heart rate and blood oxygen saturation trackers, sleep and stress monitoring sensors etc. In addition, in-built GPS, a compass and a barometer are available for tracking 15 activities and 24 indoor workout options.

Coming to the T-Rex, comes with advanced sensors for health monitoring and tracking. The heart rate sensor is in, but you won’t be able to see the SpO2 sensors, unlike the G-Squad, in the T-Rex. However, other sensors such as 3-axis acceleration sensor, Geomagnetic sensor and Ambient light sensor are on-board.


The G-SHOCK G-Squad is the first Casio smartwatch to run WearOS. The Wear OS interface on G-Squad includes several iconic G-Shock watch faces as well as Casio’s custom apps for sports-specific data like altitude measurement, tide graphs and road gradient. If the stock watch faces are not enough for you, you may also download any watch-compatible app offering watch faces from the Google Play Store for free.

Amazfit’s smartwatches run on their own proprietary, closed Android-based operating system dubbed as Amazfit OS. As you’d expect, the software capabilities are limited to what Amazfit can offer in its OS. To be frank, Amazfit OS is nowhere near WearOS by Google and the OS itself can be a deal-breaker itself for some. Adding to that, the interface and touch experience are not the most responsive or fluid, but consistent though.

So, in terms of software, the G-SHOCK takes the limelight.

App for Management

Both the smartwatches support their specific companion app. For the T-Rex, it’s known as Zepp App (formerly known as the Amazfit App) available both on Android and iOS. While for G-SHOCK, the app available is G-SHOCK MOVE available both on Google Play and Apple App Store.

We’re not going in-depth with the App features, as they simply cater almost the same functionality – App management of various logs useful for training, from activity history and analysis to progress verification etc.

Comparisons, never end. However, we’ve covered almost all the important aspects of a smartwatch worth comparing. Hope you’d got a better idea of the two wearables. If in case you need more information don’t forget to reach out to us in the comments.

He often loves to write and read about new technologies. He is actively working for GizmoChina, GoAndroid and several other blogs. In his leisure time, he loves to tinker with servers.

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