Conclusion - T-Rex Ultra 2 is suitable for expeditions and everyday use
The Amazfit T-Rex Ultra 2 is a promise. It's ready for the big adventure. It works even at -30 degrees Celsius, lasts forever and never loses its satellite connection. In everyday use, the smartwatch impresses with its large, bright display and long battery life.
However, the size does not fit all wrists and the Ultra 2 can easily slip out of place during sports. The app selection is limited and mobile payments are usually only possible via detours.
Pros
Cons
Price and availability
Amazfit is calling for an RRP of 550 euros for the T-Rex Ultra 2. The smartwatch is sold directly via the manufacturer's website, but also via other major retailers such as Amazon. The Ultra 2 is only available in one size, one color and one configuration. It is available at the time of testing.
- $549.99Amazfit T-Rex Ultra 2 Dual-Band GPS Outdoor Smartwatch, 51mm Ti Body, 1.5" Sapphire AMOLED Display, Flashlight, 30 Days of Battery, Offline Maps, 10 ATM, 180+ Sports Mode for Android & iPhone, Black
- $251.99Amazfit T-Rex 3 Rugged/Military Smart Watch 48mm, GPS (with Privacy), Offline Maps, Long Battery Life,328 Feet Water-Resistant, 170 Fitness/Sport Modes, AI, Voice Control, for Android or iPhone, Black
- $399.99Amazfit T-Rex 3 Pro Outdoor Smart Watch 48mm Sapphire AMOLED Display, Ti Bezel, Dual Band GPS, Offline Maps, 25 Days Battery, Built-in Flashlight, 10 ATM, 180+ Sports Mode for Android & iPhone, Black
Table of Contents
- Conclusion - T-Rex Ultra 2 is suitable for expeditions and everyday use
- Housing and features - T-Rex Ultra 2 with a huge titanium housing
- Setup and operation - only with the Zepp app
- Health and fitness - BioCharge and PAI for a health overview
- Display - T-Rex Ultra 2 is bright, but not at the top
- Performance and runtime - Hardly any information on the T-Rex Ultra 2
- Possible alternatives in comparison
Amazfit offers a variety of different smartwatches in all price ranges. The T-Rex Ultra 2 falls into the genre of large adventure watches, which are designed to function, navigate and last for a long time even under extreme conditions. Prominent competitors are the Apple Watch Ultra 2, the Samsung Galaxy Watch Ultra or the Huawei Watch Ultimate 2.
Housing and features - T-Rex Ultra 2 with a huge titanium housing
Amazfit has given the T-Rex Ultra 2 a titanium casing. With a case diameter of 51 millimetres and a height of almost 15 millimetres, the smartwatch is quite bulky. This impression is further reinforced by the angular design.
The rubber strap is 26 millimetres wide to match. It can be changed without tools, but the strap connection is proprietary. The 1.5-inch AMOLED display is topped and protected by the titanium frame.
A special feature is the LED flashlight built into the frame with various brightness levels, which is very useful. NFC for wireless payment is on board, but the T-Rex Ultra 2 does not support mobile communications.
There are four large buttons in the casing. These are easy to reach, but sit with play in the housing. There is also a speaker, microphones and a depth sensor. According to the manufacturer, the smartwatch can dive to depths of up to 45 meters.
At 93 grams including the strap and 69 grams without the strap, the smartwatch is surprisingly light for its size.
Sustainability - Hardly any information from Amazfit
The packaging of the Amazfit T-Rex Ultra 2 is made from 100% recyclable material. The charging pad can be connected with any USB-C cable. The manufacturer does not provide any more information on the subject of sustainability.
Setup and operation - only with the Zepp app
The Zepp app must be installed to set up and operate the Amazfit smartwatch. This is available for Android and iOS. After installation, the app requires some permissions. The smartwatch is then quickly found and connected by scanning a QR code.
After the basic settings, the app and watch provide a short tutorial on how to use them. The smartwatch can be operated using the four buttons as well as by swiping gestures on the touchscreen. Settings can usually be made both directly on the smartwatch and in the app.
All collected data is also evaluated and displayed in the app.
Telephony and notifications - T-Rex Ultra 2 with QWERTY keyboard
Thanks to the microphone and speaker, the T-Rex Ultra 2 can also be used to make calls, but only if the paired smartphone is nearby. The voice quality is fine for short calls and the speaker is sufficiently loud.
The Amazfit smartwatch is also impressive when it comes to notifications. The T-Rex Ultra 2 usually displays incoming messages reliably during the test period. The watch can also display emojis and images in chats. Replies are possible via short answer, voice input or a full QWERTY keyboard. Inputs are usually error-free.
Which apps are allowed to send notifications can be set individually in the Zepp app. The smartwatch lost the connection to the smartphone a few times during the test, even though it was nearby. An update also changed the notification settings.
Voice assistant - also offline and based on OpenAI
Amazfit relies on its own voice assistant - Zepp Flow. Voice commands can be used to change settings on the watch or open apps. The software provides answers by voice and shows information on the display.
There are short waiting times during operation. In addition, the assistant does not have access to information from the internet, such as opening hours. During the test, the language repeatedly switches between German and English.
The added value of Zepp Flow was very clear in the test scenario. Other assistants cannot be installed. According to the app, the voice assistant is based on OpenAI software and also works offline to a large extent.
Health and fitness - BioCharge and PAI for a health overview
Amazfit uses a value called BioCharge to assess general health and fitness. This is intended to provide information about performance and changes in body energy. The value takes into account sleep quality, heart rate variability, stress levels and activity data.
The value is intended to help recognize when training makes sense and when it is better to take a break. The software also provides an overview of the value over the course of the day. This should make it possible to analyze particularly strenuous activities.
The value is supplemented by PAI. This index records the movement times over seven days and sets them in relation to the pulse values.
Activity targets - T-Rex Ultra 2 shows developments
The smartwatch and app provide information on steps taken per day, week and month. In addition to the steps, the distance covered, time in motion and calories burned are also displayed. The software also indicates how many days the target has been reached.
The values for the week and month can be compared with those of the previous period. The T-Rex Ultra 2 also indicates the time spent in fat burning mode and the hours per day spent standing. The number of floors climbed is also recorded.
Heart rate, heart rhythm and blood oxygen saturation
The Amazfit T-Rex Ultra 2 can measure heart rate and blood oxygen saturation. In order to better assess the measured values, we compare them with those of reference devices. A Polar H10 chest strap is used as a reference for the heart rate measurement.
Both devices give the same resting heart rate. We measure the power pulse at three different times. The average deviation from three measurements is a high 11.53 percent. The highest deviation in one measurement is 21 beats per minute. Overall, it is noticeable during training that the watch slips slightly due to its design, which can lead to incorrect measurements.
When measuring blood oxygen saturation, a Braun pulse oximeter 1 is used as a reference device. On average from three measurements, we found no deviation; both devices gave the same values. We have written a separate article on the measuring accuracy of smartwatches a separate article on the accuracy of smartwatches.
Sleep tracking - Amazfit with and without subscription
The Amazfit T-Rex Ultra 2 offers comprehensive sleep tracking. The smartwatch monitors the duration of sleep and divides sleep into deep, light and REM sleep. The software provides times and percentages for all phases and the app also creates a graph.
It also provides information on sleep regularity, heart rate during sleep, hypnosis and breathing rate. The software can create weekly and monthly reports and show developments in sleep behavior.
The software can be used to keep bedtime diaries and record wake-up moods. Zepp Aura offers additional health statistics and personalized music to help you fall asleep. However, these services are subject to a charge.
The smartwatch is also supposed to detect naps. In most cases, the detection works reliably. Only once did the smartwatch mistake an evening of television for sleep.
Workout recording - Amazfit with automatic tracking
The T-Rex Ultra 2 should be able to track over 180 types of sport. Templates can be used for training, such as planned routes. Interval training is also supported in various sports. The smartwatch displays training data in an easy-to-read format and also offers quick access to music control.
The smartwatch can measure VO2 max and indicates the training load after training. An AI-supported, individual training plan can be created with Zepp Coach. The T-Rex Ultra 2 also recognizes workouts in eight different sports and records them automatically. This worked absolutely reliably in the test.
GNSS and navigation - Amazfit with ski and golf maps
Amazfit attaches great importance to the T-Rex Ultra 2's positioning capabilities and map display. The smartwatch supports all common satellite systems in dual band. Routes can be used for training. The smartwatch also offers return navigation: both on the route used and the search for the shortest route.
Maps can be downloaded to the watch. Amazfit also offers special ski, mountain and golf maps. Navigation is possible directly on the smartwatch. You can also set your own markers. Completed routes can be exported in GPX, TCX and FIT format.
Display - T-Rex Ultra 2 is bright, but not at the top
The 1.5-inch AMOLED display of the Amazfit T-Rex Ultra 2 offers a resolution of 322 PPI. We measured a maximum display brightness of 2642 cd/m² with the ambient light sensor activated. A maximum of 614 nits is possible without the sensor.
The display is also easy to read in the sunshine. However, other outdoor watches are even brighter. More annoying in the test is that the glass of the T-Rex Ultra 2 is susceptible to fingerprints and gets dirty quickly.
The always-on display with extensive customization options is a good solution. During our measurements, we noticed the display flickering at a frequency of 60 Hz.
| Amazfit T-Rex Ultra 2 | Apple Watch Ultra 2 | Huawei Watch Ultimate 2 | Samsung Galaxy Watch Ultra | |
|---|---|---|---|---|
| Response Times | ||||
| PWM Frequency (Hz) | 60 | 60 | 60 | 60 |
| PWM Amplitude * (%) | 41.98 | 25.32 | ||
| Screen | 12% | 39% | 21% | |
| Brightness middle (cd/m²) | 2642 | 2947 12% | 3675 39% | 3192 21% |
| Black Level * (cd/m²) | ||||
| Total Average (Program / Settings) | 12% /
12% | 39% /
39% | 21% /
21% |
* ... smaller is better
Screen Flickering / PWM (Pulse-Width Modulation)
| Screen flickering / PWM detected | 60 Hz |  | |
The display backlight flickers at 60 Hz (worst case, e.g., utilizing PWM) . The frequency of 60 Hz is very low, so the flickering may cause eyestrain and headaches after extended use. In comparison: 52 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 7822 (minimum: 1.31 - maximum: 343500) Hz was measured. | |||
Performance and runtime - Hardly any information on the T-Rex Ultra 2
Amazfit does not provide any information on the SiP installed. The eMMC memory is 64 GB in size. The smartwatch's operating speed is high. From time to time, there are slight jerks when quickly switching between apps or scrolling. The system runs very stably in the test and receives several updates.
Battery life - T-Rex Ultra 2 lasts 10 days
The battery life is a major strength of the T-Rex Ultra 2, with the manufacturer advertising up to 30 days. We did not achieve this in the test. When using all functions, including activated AoD and automatic training recording, the smartwatch only needs to be recharged after 10 days.
Charging takes place on a magnetic charging pad with metal pins; unfortunately, the T-Rex Ultra 2 does not support QI charging. The charging times are good. The watch charges from 15 to 68 percent in 30 minutes. It takes around 60 minutes to fully charge the 870 mAh battery. We use an Anker 335 power supply unit.
Possible alternatives in comparison
Image | Model | Price | Size | Weight | Battery Capacity | Display |
|---|---|---|---|---|---|---|
1.  | Amazfit T-Rex Ultra 2 | Amazon: List Price: 550€ | 1.50" | 89.2 g | 870 mAh | 1.50" 480x480 322 PPI AMOLED |
2.  | Apple Watch Ultra 2 S9 | Amazon: List Price: 899€ | 1.92" | 70 g | 564 mAh | 1.92" 502x410 326 PPI OLED |
3.  | Huawei Watch Ultimate 2 | Amazon: List Price: 999€ | 1.50" | 80.5 g | 867 mAh | 1.50" 466x466 310 PPI AMOLED |
4.  | Samsung Galaxy Watch Ultra Exynos W1000, Mali-G68 MP2 | Amazon: List Price: 699€ | 1.50" | 93 g | 590 mAh | 1.50" 480x480 AMOLED |
Transparency
The selection of devices to be reviewed is made by our editorial team. The test sample was given to the author by the manufacturer free of charge for the purposes of review. There was no third-party influence on this review, nor did the manufacturer receive a copy of this review before publication. There was no obligation to publish this review. As an independent media company, Notebookcheck is not subjected to the authority of manufacturers, retailers or publishers.
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