The Amazfit T-Rex is one of the latest smartwatches from Huami, released alongside the Bip S. It’s a rugged smartwatch with MIL-STD-810G- US military durability certification that means this watch can withstand harsh weather conditions. Compare it with two other fine smartwatches from the same brand; Amazfit Bip – one of the best-selling smartwatches on the market with a very long battery and the Amazfit GTR – a fine smartwatch with a classic appearance. Compare the specs and features of these three to find the differences.
Amazfit Bip vs T-Rex vs GTR Specs Compared
| Amazfit Bip | Amazfit T Rex | Amazfit GTR (47mm) | |
|---|---|---|---|
 |  |  | |
ABOUT DEVICE | |||
| Device name | Amazfit Bip | Amazfit T-Rex | Amazfit GTR (47mm) |
| Device type | Sport/Fitness smartwatch | Sport/Fitness smartwatch | Sport/Fitness smartwatch |
| Predessesor | -- | __ | -- |
| Successor | -- | -- | -- |
| Released date | August, 2017 | January, 2020 | July, 2019 |
| Ideal for | Unisex | Men | Unisex |
DISPLAY | |||
| Display type | TFT LCD | AMOLED | AMOLED |
| Display size | 1.28 inch | 1.3 inch | 1.39 inches (47mm) |
| Display resolution | 178 x 178 pixels | 360 x 360 pixels | 454 x 454 pixels (47mm) |
| Pixel density | -- | -- | 326 ppi |
| Input type | Touchscreen, 1 physical button | Touchscreen, 4 physical buttons | Touchscreen plus 2 button |
| Always-on | Yes | Yes | Yes |
| Customizable watch face | Yes | Yes | Yes |
BODY | |||
| Shape | Rectangular/curved | Circular | Circular |
| Dimension | 39.4 x 34.1 x 9.5 mm | 47.7 X 47.7 X 13.5 mm | 47.2 x 47.2 x 10.75 mm |
| Weight | 31g | 58g | 36 grams (Aluminum) 40 grams (Titanium) 48 grams (Stainless steel) |
| Casing material | Polycarbonate | Polymer materials | Aluminum Stainless steel Titanium |
| Strap/band material | Silicone | Silicone | Leather (Stainless steel/Aluminum) Fluoro rubber (Titanium) |
| Bezel Material | Polycarbonate | Polymer | Stainless steel Aluminum Titanium |
| Strap size | 20 mm | 22 mm | 22 mm |
| Interchangeable band | Yes, 20mm | Yes, 22mm | Yes, 22mm |
| Screen protection | Corning Gorilla glass 3 | Corning Gorilla glass 3 | Corning Gorilla glass 3 |
| Water resistant/Protection | Yes, IP68 | Yes, 5ATM (MIL-STD-810G) | Yes, 5ATM |
| Swim-proof | Not recommended | Yes, recommended | Yes, recommended |
| Color(s) | White Green Red Black | Gun grey Black Army green Khaki | Black Gray |
MEMORY | |||
| RAM | -- | __ | 16MB |
| Internal storage | -- | _ | 64MB |
| Memory card slot | No | No | No |
CONNECTIVITY | |||
| Bluetooth | Bluetooth v4.0 | Bluetooth v5.0 | Bluetooth v5.0 |
| Bluetooth calling | No | No | No |
| Wi-Fi | No | No | No |
| NFC | No | Yes (China) | __ |
| Payment system | None | Yes(China) | __ |
| GPS | Yes, GPS/GLONASS | Yes, GPS/GLONASS | Yes, GPS/GLONASS |
CELLULAR TECHNOLOGY | |||
| Technology | None | None | None |
| SIM | None | None | None |
| Band | No | No | No |
NOTIFICATIONS | |||
| Email alert | Yes | Yes | Yes |
| SMS alert | Yes | Yes | Yes |
| Calls alert | Yes | Yes | Yes |
| Event reminder | Yes | Yes | Yes |
| Weather | Yes | Yes | Yes |
| Third-party apps | Yes | Yes | Yes |
| Text response | No | Quick replies | Quick replies |
FITNESS TRACKING | |||
| Sleep apnea | No | No | No |
| Sleep tracking | Yes | Yes | Yes |
| Steps | Yes | Yes | Yes |
| Floors climbed | No | Yes | Yes |
| Heart rate monitoring | Yes | Yes | Yes |
| Calories | Yes | Yes | Yes |
| Distance | Yes | Yes | Yes |
| Stress | No | Yes | No |
| VO2 Max. | No | Yes | No |
| Blood oxygen | No | No | No |
| Blood pressure | No | No | No |
| Menstrual cycle tracking | No | No | No |
| Swim tracking | Yes | Yes | Yes |
| Under-water heart rate tracking | No | No | No |
| Preloaded maps | No | No | No |
| On-screen workout modes | No | No | No |
| Triathlon mode | No | No | No |
| ECG Tracking | No | No | No |
| Preloaded sport modes | Yes, 4 | Yes, 14 | Yes,12 |
| Safety tracking | No | No | No |
MEDIA | |||
| Audio | No | No | No |
| Music streaming | No | No | No |
| Bluetooth music | No | No | No |
| Radio | No | No | No |
| Loudspeaker | No | No | No |
| Microphone | No | No | No |
| Camera | No | No | No |
SENSORS | |||
PLATFORM | |||
| Operating system (OS) | Proprietary OS | Proprietary OS | Proprietary OS |
| Chipset | -- | -- | -- |
| CPU | -- | 1.2GHz Dual core processor | -- |
| GPU | -- | -- | -- |
BATTERY | |||
| Type of battery | Non-removable Li-Polymer battery | Non-removable Li-polymer battery | Non-removable Li-polymer battery |
| Battery capacity | 190 mAh | 390 mAh | 410mAh |
| Battery life | Standby: 90days Mixed Usage: 40 days+ GPS tracking: 20 hrs+ | Standby: 60 days+ Mixed Usage: 18 days+ GPS tracking: 18 hrs+ | Standby: 70 days+ Mixed usage: 20 days+ GPS continuous use: 40 hours |
| Charging type | 2-pins POGO pin | Charging cradle | Magnetic charging cradle |
| Charging time | About 2-3 hours | About 1-2 hours | About 1-2 hours |
| Battery saver mode | No | No | No |
| Solar power | No | No | No |
| Rapid charging | No | No | _ |
CLOCK FEATURES | |||
| Time/Date | Yes | Yes | Yes |
| Stopwatch | Yes | Yes | Yes |
| Alarm | Yes | Yes | Yes |
OTHER FUNCTIONS | |||
| Control camera | Yes | Yes | Yes |
| Music control | Yes | Yes | Yes |
| Find phone | Yes | Yes | Yes |
MISC | |||
| Compatibility | Android 4.0+ iOS 8.0+ | Android 5.0+ iOS 10.0+ | Android 5.0+ iOS 10.0+ |
| Companion app | Zepp app (Formerly Amazfit app) | Zepp app (Formerly Amazfit app) | Zepp app (Formerly Amazfit app) |
| Voice command | No | No | No |
BOX CONTENTS | |||
| Amazfit Bip | Amazfit T-Rex | Amazfit GTR (47mm) | |
| Straps | Straps | Straps | |
| Charger | Charging cradle and USB cable | Charging cradle and USB cable | |
| Quick start guide | Quick start guide | Quick start guide | |
| NOTE: We can't guarantee that all the information on this table are 100% correct. Read full disclaimer. Please, report an error. | |||
| Official Site | Official Site | Official Site | |
What’s the Difference?
- Design
- Fitness Tracking
- Battery Life
Each of these three has got a decent design and looks good to go for any occasion. The Bip is the most compact, it’s also the slimmest and weighs the least which of course makes it the most comfortable to wear. The T-Rex with a 47.7mm case size is quite bulky and it weighs the most, compared to the Bip and GTR which are both very lightweight. In other words, the T-Rex is not befitting wear for women, it’s a man’s watch.
The Bip and T-Rex have polymer case material as against the GTR which is available in stainless steel, titanium or lightweight aluminum. And while the Bip and T-Rex come with silicone straps, the GTR comes with a leather or fluoro-rubber material that complements its classic appearance.
Looking at the display, the Bip’s transflective LCD display is not so rich when compared to AMOLED powering the display of the T-Rex and GTR, but it’s easier to read under sunlight compared to the other two.
Each of these three will track your steps, sleep, continuous heart rate monitoring and there’s inbuilt GPS in all three which enables outdoor activity tracking such as routes and location.
The GTR comes with 12 preloaded sport modes that include outdoor running, swimming, walking and treadmill, while the Bip has only 4 preloaded sport modes and the T-Rex has 14 sport modes which makes it a more comprehensive activity tracker. Moreover, triathlon sport modes will be added to the T-Rex via the OTA upgrade. The Amazfit Watch App is your fitness companion on the GTR and T-Rex devices that allows you to view your daily activity progress and manage your fitness goals, while the Bip has the Mi Fit App as it’s fitness companion.
These three have some of the longest battery life on the market, it’s one of the main reasons Amazfit smartwatches are some of the best selling on the market. The Bip has the longest battery life that keeps you going for about a month thanks to its transflective LCD display compared to the GTR and T-Rex with over 2 weeks-long of battery life.
Verdict
Each of these three is a nice smartwatch with a decent design, fitness-focused and long battery life that allows you to go long from a single charge. However, while the GTR takes the appearance of a traditional watch, the Bip and T-Rex are rather sporty in appearance making these two more befitting wear for sports events.
The T-Rex with more activity tracking features is the most comprehensive fitness tracker and being certified MIL-STD-810G, it’s the most durable and sturdy device out of these three. It’s the best choice, while the Bip and GTR are nice alternatives.
Prices
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Hi! I’m Jude, the chief editor at Smartwatchseries.com
I’m a graduate of biochemistry, a 3D artist and a passionate fitness enthusiast. On here, I and other smartwatch fans work hard to help you find the right smartwatch for you with our guides, reviews, and comparisons.
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