Intelligent tracker

Fitbit Charge 4

Rugged smartwatch

Amazfit T-Rex

If you want an in-depth tracking experience but you don't necessarily want a smartwatch, the Fitbit Charge 4 will do the trick. This compact fitness tracker has many essential features, including built-in GPS, heart-rate monitoring, 5 ATM water resistance, and other perks that might appeal to you.

$150 at Amazon

Pros

  • Built-in GPS
  • Mobile payments
  • 20+ exercise modes
  • Active Zone Minutes
  • Female health tracking

Cons

  • Shorter battery life
  • Small screen makes navigation tricky
  • More expensive but still not a smartwatch

While Amazfit may not be as well-known as Fitbit, it has an impressive smartwatch lineup, including the new T-Rex. This wearable is rugged as ever with tons of useful features. You'll have built-in GPS, health/activity tracking, heart-rate monitoring, and 20-day battery life. It's also quite affordable.

$140 at Amazon

Pros

  • Built-in GPS
  • Heavy-duty design
  • 14 sport modes
  • Impressive 20-day battery life
  • Fairly priced for a smartwatch

Cons

  • App support is lacking
  • Can't change the bands
  • Too large for some wrists

Whether you're a beginner who's just begun tracking your daily activity or an experienced tracking enthusiast who wants every little detail, there's a wearable out there for everyone. Two options to consider are the Amazfit T-Rex and the Fitbit Charge 4. They're not far off in price, but they're geared toward two entirely different users.

One of the first questions you'll need to ask yourself is whether you want a smartwatch or a more compact activity tracker. This might be the deciding factor for some people who need more than a tracker can offer or for those who aren't particularly interested in smartwatches. You'll find that the T-Rex and the Charge 4 share many of the same perks, but there are a few distinctions that set them apart.

Larger than life

Amazfit T-Rex reviewSource: Apoorva Bhardwaj / Android Central

If the first thing that comes to mind when you see the Amazfit T-Rex is how large it is, you're not alone. This watch comes in a whopping 47mm case made of polymer. It's available in black, army green, and khaki. You'll get a big, bright AMOLED display with a touchscreen that's easy to navigate. Unfortunately, you don't get interchangeable straps with the T-Rex, so hopefully silicone is your preferred band material.

As far as battery life goes, you can't really beat what this watch is bringing to the table. This device has a new circuit design that was developed exclusively for the T-Rex. The advanced low power-consumption chip combined with deep power optimization results in longer battery life. With typical use, your battery will last for 20 days. If you keep your watch in basic watch mode with Bluetooth turned off, it will last up to 66 days. You get 20 hours in continuous GPS mode.

Amazfit T-Rex Fitbit Charge 4
Display 1.3-inch AMOLED display 1-inch grayscale OLED
Dimensions 47.7 x 47.7 x 13.5 mm 35.8 x 22.7 x 12.5 mm
Sensors BioTracker PPG, Bio-Tracking optical sensor, 3-axis accelerometer, geomagnetic sensor, ambient light 3-axis accelerometer, altimeter, optical heart rate monitor, NFC
Battery life 20 days 7 days
Water resistance 5 ATM 5 ATM
Onboard GPS ✔️ ✔️
Mobile payments ✔️
Interchangeable bands ✔️
Military-grade durability ✔️

No matter what type of activities you enjoy, you'll be able to track it with the Amazfit T-Rex. You have 14 sport modes, including walking, trail running, indoor and outdoor cycling, pool and open water swimming, hiking, climbing, and more. Additionally, you'll have built-in GPS for tracking your route, heart-rate monitoring, sleep tracking, and more.

Many users will love the fact that the Amazfit T-Rex has passed 12 military-grade certifications.

Many users will love the fact that the Amazfit T-Rex has passed 12 military-grade certifications. It can withstand conditions as hot as 150 degrees or as cold as -104 degrees Fahrenheit and it can last for 240 hours in damp heat. It's also waterproof up to 50 meters, so you can take it for a swim or in the shower without a problem. Needless to say, you'll be unstoppable with this watch on your wrist.

Compact but capable

Fitbit Charge 4 ReviewSource: Joe Maring / Android Central

Whether you're a beginner who's not quite ready for a full-blown smartwatch or you happen to be a loyal Fitbit user, the Charge 4 might be the better option for some folks. As you might've guessed, the design is much more compact and lightweight. You'll have the option to change the bands on this device, which is important to some users. Don't expect a fancy display or a ton of functionality. You'll need to do a lot of your navigating in the mobile app. With a compact design, you end up settling for a smaller screen.

It might be small, but you still get a full week of battery life with the Fitbit Charge 4.

It might be small, but you still get a full week of battery life with the Fitbit Charge 4. It will last for 5 hours in continuous GPS mode. This tracker also comes with heart-rate tracking, advanced sleep monitoring, and female health tracking. The new Active Zone Minutes feature uses the heart rate sensor to ensure you have an optimal workout when you exercise. You'll earn credit when you get your heart pumping and it gives you daily and weekly goals to work toward.

This device also has 5 ATM water resistance, so you don't have to worry about getting it wet. You'll enjoy 20+ goal-based exercise modes, including running, biking, swimming, yoga, and more. It also has automatic workout recognition for some activities in case you forget to start it manually. You'll enjoy mobile payments with Fitbit Pay as well as Spotify Connect & Control that lets you control your Spotify music from your wrist.

Bottom line

While each of these devices has its selling points, it most likely will come down to what type of tracking experience you want. If you're looking to do most of your navigating right from your wrist, then you'll want a large display that's easy to navigate. In that case, the Amazfit T-Rex is the better pick. It's also highly durable, so you don't have to worry about wearing it down with your active lifestyle. As we mentioned, the bands aren't interchangeable and the app support needs work. Other than that, this is a stellar smartwatch at a low price.

Alternatively, do you want to be tracking your workouts in a few quick motions and then have all the data readily available on your phone's corresponding app? The Fitbit Charge 4 is ideal. It's also lightweight, compact, and unassuming. If you're not trying to make a statement with your wearable, this is a very subtle accessory that won't stand out. Not to mention that the Fitbit ecosystem is superior to Amazfit's. If you're set on having a tracker rather than a smartwatch and don't mind paying more, you'll likely be a fan of the Fitbit Charge 4.

Overall, the Fitbit Charge 4 is the best option for most people. It has a superior suite of apps, it fits the most wrists, and is the best for people who do general fitness and exercising. If you do a lot of outdoor sports or plan on going backpacking, the T-Rex is no doubt the best fit.

Intelligent tracker

Fitbit Charge 4

Tiny buy smart

If you want many of the smarts of a smartwatch packed into a lightweight tracker, you'll appreciate the Fitbit Charge 4. You'll enjoy a week of battery life, GPS, 20 exercise modes, Fitbit Pay, Spotify music controls, and Active Zone Minutes.

Rugged Smartwatch

Amazfit T-Rex

For the tough ones

When you need a rugged smartwatch that can keep up with your adventurous lifestyle, you'll love the Amazfit T-Rex. You don't have to spend a fortune, either. You get GPS, military-grade durability, 14 sport modes, and heart-rate monitoring.

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