In China, since around 2015, smartwatches have become widely used by schoolchildren. They are advertised on television throughout the country as a safety device whereby the child can call in case of emergency. The devices are commonly colorful and made of plastic. They normally have no display unless a button is pushed. These smartwatches have limited capability compared to other smartwatches; their main functions consist of being able to conduct calls, displaying of time, and sometimes have air temperature sensitivity. They cost around $100 to $200 USD.
Smartwatches, like smart phones, can also run apps, via your smart phone or right on the watch. These include health and fitness apps (thus the comparison with activity trackers), apps that control functions such as music and the camera on your phone, navigation apps, and more. Because most smartwatches have open software platforms (at least so far), developers are coming up with new and innovative apps that can increase the functionality of the devices.
On 9 September 2014, Apple Inc. announced its first smartwatch called Apple Watch to be released in early 2015. On 24 April 2015, Apple Watch began shipping across the world. Apple’s first try into wearable technology was met with considerable criticism during the pre-launch period, with many early technology reviews citing issues with battery life and hardware malfunctions. However, others praised Apple for creating a potentially fashionable device that can compete with "traditional watches," not just the smartwatch industry in general. The watch only turns on when activated (either by lifting one's wrist, touching the screen, or pressing a button). On 29 October 2014, Microsoft announced the Microsoft Band, a smart fitness tracker and the company's first venture into wrist-worn devices since SPOT (Smart Personal Objects Technology) a decade earlier. The Microsoft Band was released at $199 the following day, on 30 October 2014.
I’ve worn a smartwatch almost daily for nearly five years as of this writing. I often feel that it keeps me alert to what’s happening, especially for things like texts from my wife and close friends, alarms that a parking meter is nearly expired, or reminders that dinner needs to start marinating or roasting. It has also encouraged me to get moving and take a walk when I’d otherwise stay in place. Sometimes it has made me feel rude, distracted, or overly attached to whatever little blip comes next. It has come in handy on my bike, and it has distracted me when I’m driving my car. Some of this can be better handled through settings and filters, but some of it comes from human nature.
Smart watches are here to change the way you live. Now you can power through your workouts while the latest technology keeps track of your every move, check your calendar and keep an eye on the weather forecast wherever you are. You can also sync your smartphone with your watch, so you can check your texts, see who’s calling and receive notifications while keeping your iPhone 6 Plus safely tucked away.
Aside from its jack-of-all-fitness-trades, master-of-none nature, the Gear Sport has other drawbacks. Chief among them is that voice dictation is significantly less reliable than on the Apple Watch or Wear OS and is best used for short phrases and quick replies. Then there’s S Voice, the digital assistant that can’t do much—and you probably don’t have time to learn how to make it do the few things it can do. And major apps still do not have a presence in Samsung’s marketplace—the Sport runs Samsung’s Tizen operating system instead of Wear OS—so any app or device you want to control directly on your phone is a gamble on an indie developer having the same need.
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. 
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Speaking of music, that's what really sets this smartwatch apart (especially compared to Garmin's other wearables). The Vivoactive 3 Music has enough internal storage for 500 songs — and they're easy to download to your device using the Garmin Express software. Once your songs are downloaded, you can listen to music without a smartphone. Just connect some Bluetooth headphones to the watch and you're good to go. If streaming is more your game, then you can also download some popular media apps as well.
Waterproof to 165 feet, the Versa handles swimming as well as any other exercise, with the screen surprisingly visible underwater. As is standard with many other non-smartwatch Fitbit models, heart rate tracking is built in, which allows for detailed sleep tracking. There’s no GPS, though — if you want to track your running route, you’ll need to carry your phone or pay the extra for the Ionic model.
Google confirmed to Tom's Guide that the company won't be releasing its own Wear OS smartwatch this year. The news comes after months of rumors that a Google-branded Pixel Watch running on Qualcomm's latest processor would be launched at Google's October hardware event. Instead, Google plans to focus on adding features to Wear OS on the software side and support the companies who are currently making Android smartwatches. Google's hardware event is Oct. 9.