Apple has announced the Apple Watch Series 4. It’s the first real redesign of the wearable since Apple introduced it in 2014, but the changes aren’t so drastic that you won’t recognize it as an Apple Watch. The Series 4 comes with an upgraded display, and you can choose either a 40mm or 44mm model. Even though the screens on the new models are bigger, the overall body of the Watch is roughly the same as previous models, so you shouldn’t notice much of a difference on your wrist.
The screen is great, and the pre-installed watch faces make it stand out from rivals. Android Wear feels very samey across all devices, but it's a well developed OS. It's reasonably intuitive and simple, but there's a little too much swiping and tapping on the small screen. It also works across both Android and iOS, although iPhone functionality is limited (no apps etc.)
We actually got our hands on over a dozen of these smart watches just to get a feel for what it was like to use them. While all of them came with at least one main button (or a home button if you’re an iPhone-user), the ones that stood out had scrolling down to a science. On such a small screen, swiping isn’t always the most ideal form of navigation. Some of the best smart watches for navigation, we found, had twistable dials or bezels you could turn.
Fitbit's Versa is a sleek, stylish smartwatch that works with both iOS and Android and costs less than $200, which makes it the best value smartwatch you can buy. The watch lasts four days on a charge, offers female health-tracking, advanced sleep-tracking and an app store with popular apps such as Starbucks and Pandora. You can even store music offline to listen to while you work out.
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. 
Smartwatches are still a very new thing to a lot of people, and for good reason. You don’t absolutely need one to get through the day, and some of the best smartwatches are much too expensive for many folks out there. With that said, they are good for a lot of things. They can provide you with an easy way to get information, allow you to dismiss or reply to new messages without having to pull out your phone, and much more.
In 1998, Steve Mann invented, designed, and built the world's first Linux wristwatch, which he presented at IEEE ISSCC2000 on 7 February 2000, where he was named "the father of wearable computing". See also Linux Journal, where Mann's Linux wristwatch appeared on the cover and was the feature article of LJ Issue 75. Seiko launched the Ruputer in Japan - a wristwatch computer with a 3.6 MHz processor. It was not very successful, since instead of a touchscreen it used a joystick-like device to input characters (much like high scores in arcade games), and the small screen with a resolution at 102x64 in 4 greyscales made it hard to read large amounts of text. Outside of Japan, this watch was distributed as the Matsucom onHand PC. Despite the rather low demand, the Matsucom onHand PC was distributed until 2006, making it a smartwatch with a rather long life cycle. Ruputer and onHand PC applications are 100% compatible. This watch is sometimes considered the first smartwatch since it was the first watch to offer graphics display (albeit monochrome) and many 3rd party applications (mostly homebrew).
You can also use devices that support the Google Wear operating system in conjunction with an iPhone as well as a Samsung Gear device that runs Samsung’s own Tizen operating system. But Google Wear and Tizen devices are designed to pair with smartphones using the Android OS, so you won’t get full functionality when pairing with an iPhone. For instance, some Android smartwatches carry Samsung’s smartwatch line-up and naturally enough, work best with Samsung smartphones, but are still compatible with Android-powered Huawei or Nokia phones.
I visited the Fitbit app more than I usually do during the first day of wearing the Charge 3 so I could manage notifications. This device is the first tracker to go beyond the basic call, text, and calendar alerts that most Fitbit trackers can receive. The Charge 3 can alert you to any and all happenings on your smartphone if you want. In the notification panel in the Fitbit app, you can choose which apps you want to receive alerts from—turn on all of them so you never miss a beat, or only turn on the apps that are most important to you.
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.
I've been pleased to see swim-tracking trickle down into more affordable devices over the past few years. Fitbit's Flex 2 remains its most affordable device with swim-tracking features, priced at $60. But the $150 Charge 3, with its big display and smattering of smartwatch capabilities, is for a different audience than those who would gravitate to the tiny, quasi-cylindrical Flex 2. Even if you don't swim often, water-resistance up to 50 meters means users don't have to worry about showering with the Charge 3 or dropping it in the pool by accident.
Flaws but not dealbreakers: The Vívosport’s screen is highly sensitive to incidental brushes and touches; we ended up activating the screen auto-lock feature, a small annoyance. Compared with a dedicated GPS running watch, the GPS tracking on any fitness band takes longer to connect to satellites; and it’s easier to see your pace and other statistics on a running watch’s larger LCD screen while moving than on a fitness band’s relatively miniscule display. Garmin doesn’t have the motivating social network of Fitbit, so it’s less likely that your friends or coworkers will connect and challenge you, or that a corporate fitness challenge will work with your Vívosport. A fitness band falls short of a full-featured smartwatch, because typically it won’t give you a voice assistant, let you install apps, or let you interact with phone notifications, and many of those notifications will be difficult to read on the Vívosport’s small screen.
When we compared the storage space of the Samsung Gear Sport with the other contenders, it didn’t have the most. With 4 GB — only a quarter of what you’ll get with the Apple Watch Series 3 GPS — you will have to manage your apps so you don’t run out of room. If you like to carry all of your music with you and you have an extensive library, you might run out of space with the Gear Sport.
Fossil introduced its fourth generation of smartwatches, the Q Explorist HR and Q Venture HR, upgraded versions of our current picks at the same respective prices. These editions of the watches add untethered GPS, NFC for Google Pay purchases, and heart-rate monitoring. Fossil also claims that they’re waterproof enough for swimming. However, both use an aging Qualcomm Snapdragon Wear 2100 chip when a newer version is expected to arrive in September.
Receive Texts, Emails, And Alerts Without Reaching For Your Phone/ Military-Grade Gear S3 Is Tough Enough To Handle The Elements/ Built-In S Health App, Track Your Steps, Monitor Your Heart Rate, And More/ 4GB Internal Memory/ RAM 768MB/ Wi-Fi/ Bluetooth 4.2/ Gorilla Glass SR+ Case Crystal/ 1GHz, Dual Core (Exynos7270) Processor/ 360x360 Display Resolution/ On-Cell Touch AMOLED Touchscreen/ GPS Navigation/ Dark Grey Finish
Then your typical exercise activity will determine which model is the best fit. You can expect to pay $1500 - $350 for a fitness tracker. If you are simply interested in hitting your 10,000 steps a day, an entry-level Fitbit will do the trick for around $150. Garmin has fitness trackers designed specifically with runners and cyclists in mind, giving you accurate tracking of biking and cycling distance covered using GPS. They’ll cost more as a result - $350 - $800.
Our top pick for most people is the Apple Watch Series 4 with GPS (starting at $399), which has a huge display, ultra-fast processor, Raise to Speak Siri, fall detection and a built-in electrical heart rate sensor for taking on-the-go electrocardiograms. It also runs watchOS 5, which makes the watch even more useful with automatic workout-tracking, offline podcast playback and a Walkie-Talkie voice chat feature.