Featured in this comparison chart are two rugged sports smartwatches from Huami/Xiaomi; the Amazfit T-Rex vs Stratos 3 – Which is a better smartwatch. The T-Rex is a relatively newer rugged-looking smartwatch certified with MIL-STD-810 – US military-grade rating, while the Stratos 3 is a more equipped and sophisticated smartwatch with more fitness tracking features, durable build, and onboard music storage. We compare these two fine smartwatches head-to-head to help you decide which is a better smartwatch.
Amazfit T-Rex vs Amazfit Stratos 3: Specifications Compared
| Product Info |
 Amazfit T-Rex Specifications, Features and Price |
 Amazfit Stratos 3 Specifications, Features and Price |
|---|---|---|
| Price | - | $239.99 |
| ABOUT DEVICE | ABOUT DEVICE | ABOUT DEVICE |
| Device name | Amazfit T-Rex | Amazfit Stratos 3 |
| Device type | Fitness/Sport smartwatch | Fitness/Classic smartwatch |
| Gender | Men | Men |
| Release date | January, 2020 | September, 2019 |
| Predecessor | — | Amazfit Stratos 2 |
| Successor | — | — |
| Versions | — | Amazfit Stratos 3 Elite Version |
| BODY | BODY | BODY |
| Dimension | 47.7 X 47.7 X 13.5 mm | 45.72 x 45.72 x 12.7 mm |
| Weight | 58g | 60 grams |
| Shape | Circular, Curved | Circular |
| Case material | Fiber-reinforced polymer | Stainless steel 316L |
| Strap material | Silicone | Silicone |
| Bezel material | Polymer | Ceramics |
| Strap size | 22 mm | 22 mm |
| Interchangeable strap | 22 mm, Yes | 22 mm, Yes |
| Screen protection | Corning Gorilla Glass 3 | Corning Gorilla Glass |
| Water resistance | Yes, 5ATM | Yes, 5ATM |
| Durability test | MIL-STD-810G | — |
| Swim-proof | Yes, recommended | Yes, recommended |
| Color | Black, Gray, Green, Khaki | Black |
| DISPLAY | DISPLAY | DISPLAY |
| Display size | 1.3 inches | 1.34 inch |
| Display type | AMOLED | Memory-in-pixel (MIP), transflective |
| Display resolution | 360 x 360 pixel | 320 x 320 px |
| Pixel density | — | — |
| Always on | Yes | Yes |
| Custom watch face | Yes | Yes |
| Input type | 4 Physical buttons, Touchscreen | 4 Physical buttons, Touchscreen |
| CONNECTIVITY | CONNECTIVITY | CONNECTIVITY |
| Bluetooth | Bluetooth v5.0 | Bluetooth v5.0 |
| Bluetooth calling | No | No |
| GPS | GLONASS, GPS | BEIDOU, Galileo, GLONASS, GPS |
| NFC | (China only), Yes | (China only), Yes |
| Wi-Fi | No | Yes, Wi-Fi 802.11 b/g/n |
| MEMORY | MEMORY | MEMORY |
| RAM | — | 512MB |
| ROM | — | 4GB |
| Memory card slot | No | No |
| CELLULAR CONNECTIVITY | CELLULAR CONNECTIVITY | CELLULAR CONNECTIVITY |
| Technology | None | None |
| SIM type | None | None |
| Band | — | — |
| NOTIFICATIONS | NOTIFICATIONS | NOTIFICATIONS |
| SMS alert | Yes | Yes |
| Calls alert | Yes | Yes |
| Email alert | Yes | Yes |
| Event reminder | Yes | Yes |
| Third-party apps alert | Yes | Yes |
| Reply to Notifications | - | - |
| MEDIA | MEDIA | MEDIA |
| Audio | No | mp3/mp4 |
| Bluetooth music | No | Yes |
| Loudspeaker | No | No |
| Microphone | No | No |
| Camera | No | No |
| Radio | No | No |
| SENSORS | SENSORS | SENSORS |
| Accelerometer | Yes | Yes |
| Altimeter | No | — |
| Ambient light | Yes | Yes |
| Barometer | Yes | Yes |
| Compass | Yes | Yes |
| ECG | No | No |
| Gyroscope | — | Yes |
| HRM | Yes | Yes |
| Pulse oximeter (SpO2) | — | — |
| Temperature | No | No |
| Other sensors | — | — |
| ACTIVITY TRACKING | ACTIVITY TRACKING | ACTIVITY TRACKING |
| Blood oxygen | No | No |
| Blood Pressure | No | No |
| Calories | Yes | Yes |
| Distance | Yes | Yes |
| ECG tracking | No | No |
| Heart rate monitoring | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Steps | Yes | Yes |
| Floors climbed | - | Yes |
| Stress | — | — |
| Fall detection | No | No |
| Menstrual cycle | No | No |
| VO2 Max | — | Yes |
| Swim-tracking | No | Yes |
| Underwater heart rate tracking | No | No |
| On-screen workout | No | No |
| Sport modes | 14, Yes | 80, Yes |
| BATTERY | BATTERY | BATTERY |
| Battery type | non-removable Lithium-polymer | non-removable Lithium-polymer |
| Battery capacity | 390mAh | 300mAh |
| Battery life | GPS: 20hrs, Regular: 20 days | Regular: 7 days+, Ultramode: 14 days |
| Charging type | 2-Pin charging | Charging dock |
| Charging time | 1-2 hours | 1-2 hours |
| Solar charging | No | No |
| PLATFORM | PLATFORM | PLATFORM |
| Chipset | — | — |
| CPU | — | 1.2GHz dual-core |
| GPU | — | — |
| Operating system | Amazfit OS | Amazfit OS |
| MISC | MISC | MISC |
| Companion app | Amazfit Watch App | Amazfit Watch App |
| Compatibility | Android 5.0+, iOS 10.0+ | Android 5.0+, iOS 10.0+ |
| Payment system | Yes | Alipay |
| Voice command | No | No |
| Find my phone | Yes | Yes |
| Box content | Amazfit T-Rex, Charger, Manual, Straps | Amazfit Stratos 3, Charger, Manual, Straps |
Amazfit T-Rex vs Amazfit Stratos 3 Differences Compared
In terms of design, the Stratos 3 is a more durable and sophisticated smartwatch than the T-Rex. The Stratos 3 has a finely polished body made of glass fiber and polycarbonate while the T-Rex has a fiber-reinforced polymer case. Furthermore, the T-Rex has a bezel made of polymer while the Stratos has a stainless steel bezel. Meanwhile, both watches come with silicone straps and are rated 5ATM.
The Display also differs. The Amazfit T-Rex has an AMOLED display which is more colorful than the LCD display of Stratos 3.
The Stratos 3 comes with a 4GB storage capacity that allows you to add your personal music to the watch so that you can listen to music without carrying your phone along. The T-Rex doesn’t allow you to add music. In other words, with Stratos 3 you can store music onboard the watch, but not with the T-Rex.
Both the Ammazfit T-Rex and Stratos 3 come with a heart rate sensor, inbuilt GPS, accelerometer, and gyroscope that enables this to track your steps, calories, sleep, and heart rate as well as routes and locations when you go for outdoor activities. However, the Stratos 3 is equipped with 8 Firstbeat algorithms that enable it to track your Vo2 Max., recovery time, and training load. This makes the Stratos 3 a more comprehensive fitness smartwatch than the T-Rex.
Meanwhile, the T-Rex with a battery life of up to 20 days allows you to go long from a single charge compared to about 7 days battery life with the Stratos 3. Nonetheless, each of these two has long battery life.
Which is Better?
Both the T-Rex and Stratos 3 are sturdily built and fitness-focused devices with a long battery life that lets you go longer. However, Stratos 3 is a more sophisticated smartwatch. It features 8 Firstbeat algorithms that monitor your blood oxygen to ascertain your fitness level, recovery time that helps you plan better, and training load that shows the physiological impact of your training over time.
Moreover, the Stratos 3 with a 4GB storage capacity will allow you to store your favorite tracks onboard the watch so that you can listen to music without carrying your phone along.
On the other hand, the Amazfit T-Rex is a decent alternative. It’s cheaper, yet a comprehensive fitness tracker. It’s very rugged, has a more colorful display, and has a longer battery life that lets you go longer.
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