The Amazfit T-Rex is a long-lasting GPS sports watch that’s rugged enough to survive Jurassic Park

ByKate Kozuchpublished 5 February 21

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The rugged Amazfit T-Rex is an outdoor GPS sports watch with impressive battery life and costs less than $150. But its bulky design và limited smarts might not be for everyone.

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Water resistance: 50 metersGPS: YesHeart rate sensor: YesDisplay: 1.3 inchesSmartphone notifications: YesSize: 4.4 x 3.3 x 1.3-inchesWeight: 2 ouncesBattery life: 20 days

Huami has made its name on low-cost wearables lượt thích the Amazfit Bip, one of the best smartwatches we’ve tested. Now, with the ultra-rugged Amazfit T-Rex, the company has turned its attention to GPS sports watches.

With a large display, on-board GPS, built-in compass & enough durability certifications to survive Jurassic Park, the Amazfit T-Rex looks lớn challenge Garmin, the megalodon in the room.

Like other devices on our best sports watch page, the T-Rex offers an impressive battery life, variety of sports modes & sleep tracking – all wrapped in its impenetrable shell. But as I discovered during my Amazfit T-Rex review, there were a few compromises made khổng lồ get lớn its low price of $140.

Amazfit T-Rex review: Price và availability

The Amafit T-Rex comes in one size, và costs $139.99. We tested the Gun Grey model, although you’re able khổng lồ choose from Rock Black, Khaki, Army Green & Camo Green versions, too.

You can buy the Amazfit T-Rex as of this writing from retailers such as Amazon, Best Buy and B&H Photo, or directly from Huami on Amazfit’s website.

Amazfit T-Rex review: Design & comfort

When I unboxed the Amazfit T-Rex, I thought Huami sent me a Casio G-Shock by accident. The thick case measures 44-millimeters, và the tough exterior is emphasized by metal screw heads, textured buttons & chunky guard pieces. Four labeled buttons surround the watch case: one for up, one for down, one for select, one for back.

(Image credit: Tom"s Guide)

The bezel has a raised bumper to protect the screen, which itself is covered in Gorilla Glass 3 and an anti-fingerprint coating. It makes the watch bulky, which some might lượt thích but I found absolutely infuriating when it would get caught on my sleeve. I couldn’t get the T-Rex lớn rest comfortably on my wrist either. Knowing this was probably a “me” problem, I had someone with a larger wrist try it out, & they were much less bothered. They even complimented its lightweight feel.

(Image credit: Tom"s Guide)

Huami is going for durability here, & it shows with the T-Rex’s hardware. The case has a Military Standard 810 rating for hostile environments, which means it can withstand temperatures ranging from 158 khổng lồ -104 degrees Fahrenheit, và be submerged khổng lồ 165 feet (5ATM). I couldn’t demo these conditions in the mild thành phố new york climate, but it certainly handled my day-to-day life over the month I wore it, which involved a chaotic move, a few trang chủ improvement projects và a variety of outdoor activities.

(Image credit: Tom"s Guide)

As rugged as the casing feels, I’m a little less confident in the band’s quality. The plastic clasp seems lượt thích it could snap, while the silicone straps feel like they could stretch out over time. Although we haven’t reviewed it yet, the $199 Garmin Instinct touts identical durability certificates and more rigid bands. Luckily the straps are interchangeable, in the chance they need lớn be replaced.

Amazfit T-Rex review: Display và interface

The Amazfit T-Rex’s 1.3-inch AMOLED touchscreen screen is colorful and bright enough lớn be seen in direct sunlight. It makes the watch look more expensive than it is, and shines compared khổng lồ the Instinct’s black-and-white screen.

(Image credit: Tom"s Guide)

The T-Rex’s interface is uninspiring, but that’s not necessarily a bad thing. I’ve seen low-cost watches try lớn overcompensate with complicated layouts, but sometimes less is more. You can navigate by swiping the screen in any direction or by using the physical buttons. Launching the activity menu is more intuitive than opening the main one, but once you get there you can control your music, countdowns, alarms and reminders. You’ll also be able to lớn see the compass, get the weather or ping your phone.

(Image credit: Tom"s Guide)

One of my least favorite things about the Amazfit T-Rex are its watch faces, and how they don’t align with the aesthetic of the outdoors. Perhaps I’m spoiled by my táo apple Watch 5, but I didn"t find a single one of the 30 available watch faces appealing. Most exude the tacky robotic vibe of early-2000s tech, none are customizable and only a few offer useful data like the weather. I think the type of person this watch is for deserves to lớn have more information at a glance.

Amazfit T-Rex review: GPS, fitness features and sleep tracking

While the majority of the best running watches are aimed at true runners, some, like the Amazfit T-Rex, cater to lớn the ultimate outdoors person, too. With GPS & compass capabilities, hikers & rock climbers shouldn’t thua trận their way if this watch is their guide. I’m no mountaineer, but when I traversed a nearby nature preserve, I found the T-Rex’s location data accurate. It knew precisely where I was, & pointed me in the right direction when I wanted to get back khổng lồ my car. The GPS on my wrist tagged my route so I could backtrack if I got lost, although it would be nice if I could’ve downloaded my course ahead of time like I can using the Garmin Explore tiện ích on the Instinct.

(Image credit: Tom"s Guide)

In addition to lớn outdoor walking, cycling, swimming, trail running, skiing & trekking, indoor treadmill, cycling, elliptical trainer và catch-all ‘exercise’ sport modes are available to choose from. No matter which you choose, you’re able to see your workout duration, distance và speed. The altitude meter will track your elevation gains, too. You can see these metrics in real-time on your wrist using the up and down buttons —the touchscreen locks when you initiate workouts khổng lồ prevent accidental taps.

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(Image credit: Tom"s Guide)

You can kiểm tra in on your heart rate at any time, too. In fact, the T-Rex offers continuous optical heart rate sensing, và will even issue a rapid heart rate warning if it senses an unexpected pace that might be harmful lớn your health. This will only happen when you’re not working out, though.

When it’s time to get some shut eye, the watch tracks your sleep cycle to clue you into the chất lượng of your snooze. It will assign a sleep score và provide a sleep chất lượng analysis report. I’m not sold on sleep tracking công nghệ as I often find it inaccurate, but when the Amazfit T-Rex says I sleep for 6 hours and 39 minutes on average I believe it. In my Garmin Vivomove Luxe review, for comparison, the watch told me I got close to 9 hours of sleep on nights I know I spent most of scrolling Twitter.

Amazfit T-Rex review: Amazfit app & third party-app compatibility

All of the Amazfit T-Rex’s fitness sensors provide useful metrics, but you’ll want to lớn reference the Amazfit tiện ích (available for Android & iOS (opens in new tab)) to lớn get a full picture of your health. It stores data on everything from your stride length & calories burned khổng lồ your training loads and weight. You can manually input your body measurements if you’re looking to track fitness goals as well.

(Image credit: Tom"s Guide)

That said, the app can be confusing lớn navigate at first và doesn’t provide much context on your metrics, lượt thích what they mean or whether you should try lớn change them. For example, it told me my current sleep average might not be good for my health, but doesn’t offer suggestions for getting more rest. I appreciated being able to lớn merge certain data with the hãng apple Health app, & often ceded lớn checking it over the Amazfit tiện ích for sleep và step information.

The T-Rex is also compatible with the running phầm mềm Strava, so you can sync your metrics khổng lồ keep up with activity challenges among your friends.

Amazfit T-Rex review: Music và notifications

There’s no on-board storage on the T-Rex, meaning it can’t hold music or offer offline Spotify support, so don’t count on being able to ditch your phone on hikes unless you’re okay with using nature as your soundtrack.

Even then, you might need khổng lồ keep your phone in arm’s reach if you’re interested in staying connected. Like many fitness trackers the T-Rex doesn"t let you respond to lớn notification. You can only see the a preview, và will have khổng lồ reach for your phone to read the entire message or answer.

It doesn’t help that the haptic vibrations feel pretty terrible, especially when I’m used to lớn those of my daily driver, the táo bị cắn dở Watch. You can create custom vibration patterns for different notification categories within the Amazfit app, if you’d like to know if you’re getting a gọi versus a text. But I would suggest disabling notifications entirely, if your routine permits. You can kiểm tra your alerts on your phone when you get to lớn the vị trí cao nhất of the mountain —the reception is probably better up there anyway.

Amazfit T-Rex review: Battery life

Like the Amazfit Bip, the Amazfit T-Rex’s selling point is its battery life. Amazfit said the T-Rex should last đôi mươi days on a single change, but that’s a modest estimate. In our testing it lasted closer khổng lồ 30 days with limited GPS usage.

The battery seeped faster when we enabled GPS for late spring hikes, zapping about 10% per hour, meaning you should get about 10 hours of juice with continuous location tracking. That’s still impressive by category standards.

With a Garmin model lượt thích the Instinct, you can adjust the GPS to ping satellites at a slower rate to lớn save battery. In smartwatch mode, the Instinct should last up lớn 14 days; with GPS turned on, battery life is 16 hours, but you can extend that khổng lồ up lớn 40 hours in Garmin’s UltraTrac mode that periodically turns off GPS lớn save battery power.

If you’re ever unsure how much longer you can expect your T-Rex khổng lồ last, you can view how many estimated hours you have left on the activity menu. There’s also a power nguồn saving mode for when you’re in a pinch.

Amazfit T-Rex review: Verdict

I’m hesitant to gọi the Amazfit T-Rex a smartwatch, even if that’s how Huami markets it. The interface feels sparse, the notification system could use work & the watch faces are stuck in 2003. But as a military-certified sports watch with all the sensors you could want, the T-Rex is a beast lớn be reckoned with. At $140, it’s less than half the price of the Garmin Instinct, making it an affordable alternative và one of the best cheap smartwatches right now.

The bright display và stamina of the Amazfit T-Rex make it a solid, but not spectacular, choice for the all-day adventurers on a budget, while the name makes it a no brainer for archaeologists.

Kate Kozuch is an editor at Tom’s Guide covering smartwatches, TVs và everything smart-home related. Kate also appears on Fox News to talk tech trends & runs theTom"s Guide TikTok account (opens in new tab), which you should be following. When she’s not filming tech videos, you can find her on an exercise bike, mastering the NYT Crossword or channeling her inner celebrity chef.

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