Why we like it: Apple Watches are the best smartwatches overall because they make it easier than any other wearable device to interact with the messages and notifications relayed from your iPhone. The Series 1, specifically, has all the features most people need at a reasonable price. It looks better than most smartwatches and fitness trackers, on wrists both large and small, thanks to two sizes and an array of finishes and bands (both official and third party). While not every major iPhone app has an Apple Watch partner app, many do, and most respond quickly and are optimized for the watch’s small screen, unlike many of the apps available for Android watches. And the Series 1 Apple Watch does a good job of independently tracking most kinds of workouts where accurate distance tracking isn’t vital,1 and encourages non-workout fitness (like standing and moving every hour). We also like that the Apple Watch lets you easily make contactless payments using Apple Pay, and if you own a Mac, you can unlock it by just getting close to it with your Apple Watch.
The top smartwatches that debuted at the 2017 Consumer Electronics Show included the Casio WSD-F20, Misfit Wearables Vapor and the Garmin Fenix 5 series. Apple released on September 22, 2017 their Apple Watch Series 3 model which offers built in LTE cellular connectivity allowing phone calls, messaging and data without relying on a nearby smartphone connection. 
That same attractive stainless steel design is here. The 240 x 240 pixel display at the heart of the body is by no means the brightest or most vibrant you'll find, but crucially delivers strong visibility in most workout conditions whether you're sweating it out indoors or outside. However, there is no touchscreen or touchpad here, you'll have to resort to pressing some buttons - that could be a deal-breaker for some, but we're sure it won't be a massive one for most.
But smartwatches have the innovation advantage these days as most companies making such devices try to develop features that competitors don't have. As a result, fitness trackers have become a bit stale. And after wearing the new Charge 3 for nearly two weeks to see how well Fitbit's gentle marriage of smartwatch and tracker features turned out, it seems the form factor remains radically unchanged—but that's not a bad thing in practice.
If fitness is your top priority, the Apple Watch Series 1 has a good number of shortcomings compared with a dedicated fitness tracker. It doesn’t have onboard GPS, so you’ll need to carry your iPhone to accurately track outdoor activities, like running or cycling, and it’s not waterproof enough for swimming. And unlike a dedicated fitness tracker, the Apple Watch can’t automatically detect and track workouts—you have to manually start it—though this feature is coming with new Watch software this fall. And Apple’s built-in Activity app doesn’t provide much detail, so if you want to dig into your fitness data, or access sleep tracking at all, you have to download third-party apps.
Why we like it: Compared with a smartwatch or fitness tracker, a dedicated GPS running watch is focused on one category of exercise: outdoor movement. GPS watches offer the fastest GPS signal lock-on and more-precise maps, while also showing up to the second details on your pace, heart rate, mile split times, and a host of other stats on an always-on display. The physical buttons on a GPS watch are easier to use while moving (and without looking), rather than having to swipe or tap on a tiny glass screen. A GPS watch’s longer battery life can better handle endurance events than a smartwatch. And the software and apps behind a good GPS watch provide more statistics and training programs to improve your efficiency. While GPS watches can show notifications, the weather, and a few other smartwatch-like conveniences, they’re much more limited in what can be done from a wrist than a smartwatch—or even a fitness tracker like the Vívosmart.
Finding and installing apps is another sore point. Android Wear 2.0 has two ways of installing apps: On the watch directly, which is woefully awkward, or through the Play Store on the Web, which is okay. Watch faces for Wear OS exist in the kind of state Android phone apps were in during their earliest days—all over the place, so good luck searching. Watch makers would do well to include some sensible, category-spanning offerings by default in their devices.
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Even today, fitness trackers have a few advantages over smartwatches: they're easier to wear since they have slimmer, lighter profiles. They're less complicated because they're designed primarily to keep you fit (not necessarily for things like emailing on the go). And, perhaps the most important distinction of all, fitness trackers are generally less expensive than smartwatches.
The Gear 2 also includes a gyroscope, an accelerometer, and a heart-rate sensor. It also can control a TV or set-top box remotely using a built-in IR blaster, and it has the ability to function as a stand-alone music player. And its built-in camera—handily built into the watch itself rather than on the band, like the original Galaxy Gear—takes 2-megapixel stills and 720p video.
But your phone will play an important part if you do get a Fitbit or Garmin device with the aim of tracking your activity. It will be the place where your health data is synced to, you can tinker with your tracking settings and review your progress. There’s also a whole ecosystem of health apps that plug into tracking devices, combining them with exercise and diet advice - MyFitnessPal, Runtastic and Strava are three of the most popular ones worth checking out.
Being able to customize the watch faces and layouts, made the Series 3 a shoo-in for our list of best smart watches. Much like you can customize the homescreen on your iPhone, you can change the layout of apps and even display the weather. While you can’t opt for third-party designs, you do have 12 different watch faces to play with. Tinker with color schemes, add or remove widgets (called “complications” on the app), and decide whether you want to have all twelve faces available on your watch (we always like having options), or cut back.
Samsung Gear S3 Frontier: Until we see what Google can pack into a smartwatch with its long-awaited Pixel Watch, the best smartwatch for Android users is the Samsung Gear S3 Frontier. It pretty much has everything a user with an Android phone needs in a smartwatch - GPS, heart rate monitor, water resistance, near field communications, an always-on digital display, messaging alerts and app support. I don’t see a real need to opt for the 3G version yet, which would untether you from your phone completely but adds around $100 to the price. ($549)
The Misfit Vapor was originally launched with a proprietary operating system, but that was ditched for Android Wear 2.0. The Vapor has a 1.39-inch AMOLED display, Snapdragon Wear 2100 processor, 4GB of storage, 512mb of RAM, and a heart rate sensor. Those specs are fairly standard for Android Wear, but the Vapor also includes 5ATM water resistance which is a huge plus, and an assortment of software features added by Misfit.
1.2" (30.4mm) Diameter Display Size/ 15 Preloaded GPS And Indoor Sports Apps/ VO2 Max And Fitness Age Estimates/ Smart Notifications, Automatic Uploads To Garmin Connect, LiveTrack And More/ Up To 7 Days In SmartWatch Mode; 13 Hours In GPS Mode Battery Life/ Corning Gorilla Glass 3 Lens Material/ Stainless Steel Bezel Material/ Fiber-Reinforced Polymer And Stainless Steel Case Material/ Silicone Strap/ Touchscreen/ Swim/5 ATM/ Black with Slate Hardware Finish
The Samsung Gear Live is the first of the company’s smartwatches to be compatible with any Android phone running Android 4.3 or higher; other Gear models can be paired only with specific Samsung phones. Like the LG G Watch and Moto 360, it runs the Android Wear OS, allowing voice commands and pushing relevant information to the wearer. Compared with the LG G Watch, we prefer the style and fit of the Gear Live. The watch body is slightly curved, which made it more comfortable. The Gear Live also has a heart-rate monitor, which the G Watch lacks.
For a device that gives you more of the functionality you enjoy with your smartphone, you’ll want to opt for a dedicated smartwatch. The leading players at the moment are the Apple Watch for iPhone users and the Samsung Gear S3 for those with Android phones. Apple Watch has its own operating system, Samsung employs its Tizen OS, and a host of other smartwatches use the Google Wear operating system.
Bottom line: Some fitness trackers work equally well with an iPhone or Android device, but some smartwatches are built to pair with Android phones so you won’t enjoy full functionality and pairing on an iPhone. The Apple Watch only pairs with the iPhone so is off limits to Android users. Your existing phone choice will play an important part in choosing a smartwatch. You can check your smartphone’s compatibility with a range of Google Wear-powered smartwatches at g.co/WearCheck
Unfortunately, you won't be able to respond to alerts (like messages and emails) from the Charge 3. That's a feature sequestered to smartwatches, but you can see most of the content of an alert on the device's screen. Considering how narrow the device's screen is, reading through a long email won't be the most comfortable experience. But at least that message will be glanceable on your wrist, as will news headlines, text messages, and other alerts as well.
The new Diesel Full Guard 2.5 has a 47mmx56mm casing which is bigger than most Wear OS watches, and there’s a 1.39-inch display at the center of that. This new refresh of the watch also includes NFC for Google Pay support, a heart rate sensor, and built-in GPS. Diesel also says this watch will last two days on a charge from the 300mAh battery. The watch also has 3ATM water resistance.
Wirecutter writers have been researching, testing, and writing about smartwatches since early 2013, just after the first Pebble watches were shipped to Kickstarter backers. I’ve personally worn nearly every notable smartwatch since that first Pebble and have written about them for a number of publications, including IT World and Fast Company. I also have extensive experience with Android phones, having written the (since outdated) Complete Android Guide and numerous articles about Android. I also contribute to and help edit the Wirecutter guide to the best smartwatch for iPhones.
If you want a smart watch that uses cellular data without using up the battery, consider upgrading to the Samsung Gear S3. A close cousin to the Gear Sport, the S3 has all the perks of an LTE smart device (downloading apps, texting, checking email) and, unlike the Apple Series 3, it won’t quit after three hours. In fact, you could feasibly get 72 hours out of this LTE version of the Samsung Gear Sport.