Amazfit T-Rex Ultra VS Amazfit T-Rex 2: OutDoor Smartwatch Comparison

Amazfit T-Rex Ultra VS Amazfit T-Rex 2 Comparison

In this comparison, we will compare the key differences and similarities between the second-generation Amazfit T-Rex Ultra and the Amazfit T-Rex 2 smartwatches. Both devices share many similarities, but the Ultra boasts some notable improvements in design and functionality. Check out Amazfit T-Rex Ultra VS Amazfit T-Rex 2 comparison.

Pros and Cons

Amazfit T-Rex UltraAmazfit T-Rex 2
Rugged capabilityExtremely robust build
All-weather operationVery accurate GPS
Strong GPS performanceUp to 20 days battery life
Attractive and functional designBright, crisp AMOLED display
A little large for small wristsExtremely heavy
Zepp App is good, if not greatZepp app not as good as its competitors
Polymer instead of steelBulky on the wrist

Before we begin, it’s worth mentioning that the writer purchased these devices for this review, showcasing genuine user experience.


Amazfit T-Rex UltraAmazfit T-Rex 2
ReleasedMarch 20, 2023May 24, 2022
MaterialHigh-strength polymerHigh-strength polymer
Size47.3 x 47.3 x 13.45 mm47.1 x 47.1 x 13.65 mm
MIL STD 15 Military Standard15 Military Standard
Display1.39 inches1.39 inches
TypeAMOLED ScreenAMOLED Screen
Resolution454 x 454 pixel454 x 454 pixel
Weight89 grams66.5 grams
SensorsBioTracker 3.0 PPG biometric sensor, acceleration, gyroscope, geomagnetic, barometric, ambient lightBioTracker 3.0 PPG biometric sensor, acceleration, gyroscope, geomagnetic, barometric, ambient light
HealthSpO2, heart rate, stress trackingSpO2, heart rate, stress tracking
Waterproof10 ATM10 ATM
Battery Type500mAh 500mAh
Battery LifeUp to 20 days in normal mode,
25 days in battery saver mode,
9 days in heavy usage scenario,
28 hours in accuracy GPS mode
Up to 24 days in normal mode,
45 days in battery saver mode,
10 days in heavy use scenario,
26 hours in accuracy GPS mode
ConnectivityBluetooth 5.0, WiFi (WLAN 2.4 GHz)Bluetooth 5.0
ColorsAbyss Black, SaharaAstro Black & Gold, Ember Black,
Wild Green, Desert Khaki
OSZepp OSZepp OS

Key Differences: T-Rex Ultra vs T-Rex 2

  • Amazfit T-Rex Ultra is 22 grams heavier than T-Rex 2 due to the inclusion of a stainless steel bezel and back panel.
  • Amazfit T-Rex Ultra offers stress-relief breathing exercises and altitude-related blood oxygen level tests, while T-Rex 2 does not have these features.
  • Amazfit T-Rex Ultra introduces two new apps for free diving enthusiasts, allowing monitoring of diving depth, heart rate, and oxygen saturation levels while diving, which T-Rex 2 lacks.
  • Amazfit T-Rex Ultra runs on Zepp OS 2.0, while T-Rex 2 uses an older software version.
  • Amazfit T-Rex Ultra has slightly lower battery life compared to T-Rex 2 in normal and GPS accuracy mode.
  • Amazfit T-Rex Ultra is priced at around $400, whereas T-Rex 2 costs around $200, making T-Rex 2 a more budget-friendly option.
  • Both watches share similar military-grade certifications, water resistance, display size, and fitness tracking capabilities, providing reliable GPS connectivity and long battery life for outdoor adventures.
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Design and Build Quality

The major difference between the two watches lies in their design and materials. The Amazfit T-Rex Ultra takes the lead in terms of build quality as it features a titanium finish, giving it a more premium and durable feel compared to the plastic finish of the T-Rex 2. When held in hand, the Ultra reflects the sophistication of titanium, making it stand out from its predecessor.

Amazfit T-Rex Ultra VS Amazfit T-Rex 2 Design and Build Quality

Additionally, the T-Rex Ultra’s strap design is an improvement over the T-Rex 2, offering better comfort and a more refined look. However, some users may find the excessive screws on the strap slightly inconvenient.

Amazfit T-Rex Ultra buid quality
Amazfit T-Rex Ultra
Amazfit T Rex 2 build quality
Amazfit T-Rex 2


Amazfit T-Rex Ultra VS Amazfit T-Rex 2 Display and Accessories

Both smartwatches comes with the same 1.39-inch AMOLED display with a 1000-nit brightness, ensuring excellent visibility even in bright outdoor conditions. The inclusion of the Always-On display mode allows users to glance at the watch effortlessly. The buttons on both watches provide convenient navigation, especially in situations where using a touch screen might be challenging, such as during workouts or swimming.

Memory and Functionality

One of the significant differences between the two watches lies in their internal memory. The Amazfit T-Rex Ultra comes with 3GB of internal memory, allowing you to store music and apps directly on the watch. In contrast, the T-Rex 2 offers internal memory only for apps. If music playback on your smartwatch is essential to you, the Ultra has the advantage in this aspect.


While both watches share many common features, the Amazfit T-Rex Ultra introduces some exclusive functions not found in the T-Rex 2. The Ultra boasts 160 modes of physical activity compared to the T-Rex 2’s 150 modes, making it a more versatile companion for fitness enthusiasts. It also holds a certification for diving, with specific standards for water resistance. Additionally, the Ultra provides information on water temperature during free diving, a feature absent in the T-Rex 2. Moreover, the Ultra has an altitude reminder that monitors oxygen levels in your blood during high-altitude activities.

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Battery Life

Battery life is a significant factor for smartwatch users. Both the Amazfit T-Rex Ultra and T-Rex 2 offer impressive battery performance. With a 400mAh battery capacity, both watches can last for over 100 days on a single charge, assuming moderate usage. However, it’s essential to consider that specific features, like Always-On display and continuous heart rate monitoring, can impact battery life.

Offline Maps and Music Storage

One of the key distinctions between the two devices is the absence of offline maps and music storage on the Amazfit T-Rex 2. In contrast, the T-Rex Ultra includes the option to download offline maps from the app. While the functionality of the maps is limited to displaying the user’s location, it still provides context during outdoor activities.

The T-Rex Ultra also stands out with its music storage feature, allowing users to store and play MP3 tracks directly on the watch. This is a significant advantage for those who prefer to leave their phones behind during workouts and listen to music using Bluetooth headphones.

Dual-Band GPS

Another notable discrepancy is the lack of dual-band GPS in the Amazfit T-Rex 2. Dual-band GPS (L1 and L5) enhances location accuracy, especially in challenging environments with obstructions or poor connectivity. The T-Rex Ultra addresses this concern by featuring dual-band GPS, ensuring more precise location tracking.

Application Compatibility

Both watches support a variety of applications available through the Amazfit Store. Although not as extensive as some other platforms, the Amazfit Store offers useful apps and games for users to explore. Notably, the recent update brought compatibility with a pedometer for cycling and a chest strap for heart rate monitoring to both watches, eliminating this as a differentiating factor.

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Price Consideration

Price can be a significant factor when choosing a smartwatch. The Amazfit T-Rex 2 is a more budget-friendly option, priced at around $199.99, making it a reasonable choice for users seeking a reliable and affordable smartwatch. On the other hand, the Amazfit T-Rex Ultra is a high-end device, priced at around $399.99, catering to those willing to invest in additional features and premium build quality.

Conclusion: Amazfit T-Rex Ultra VS Amazfit T-Rex 2

In conclusion, both the Amazfit T-Rex Ultra and T-Rex 2 are exceptional smartwatches with impressive battery life, military-grade durability, and useful sports metrics. The Ultra takes the lead with its premium titanium finish, music storage capability, offline maps, and dual-band GPS, making it a top-tier choice for users seeking a high-end experience.

However, for those on a budget or looking for a more basic smartwatch without some of the advanced features, the T-Rex 2 still offers excellent value for money. Ultimately, users must consider their specific needs, preferences, and budget to choose the best smartwatch that aligns with their lifestyle.