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.
The Watch 2 comes in two varieties, Sports and Classic. The former is a little cheaper, looking unsurprisingly much like a standard sports watch. The Classic is noticeably more attractive, with a premium-looking shell and included leather band. If you’re after something that’s appropriate at a nice restaurant as well as the gym, you may want to pay the extra money, but all features are otherwise the same.
Samsung’s new Galaxy Watch is the one to get if you need a smartwatch that can do it all. In our full review, we mentioned that it’s a fantastic all-around smartwatch, fitness, and health tracker. It has a great display, solid build, comes with Samsung Pay support, and offers wireless charging. Plus, the Tizen operating system has tons of great apps and watch faces.
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. 
The operating system you choose depends solely on the type of smartphone you have because the smart watch is paired with your smartphone. If you own an Android smartphone, your smart watch should have Android Wear or Tizen. If you own an iPhone, choose an Apple Watch. For example, the Samsung Gear S3 runs Tizen and is compatible with both the Android and iPhone.
In 2003, Fossil released the Wrist PDA, a watch which ran the Palm OS and contained 8 MB of RAM and 4 MB of flash memory. It contained a built in stylus to help use the tiny monochrome display, which had a resolution of 160×160 pixels. Although many reviewers declared the watch revolutionary, it was criticized for its weight (108 grams) and was ultimately discontinued in 2005.
But with a wider choice comes deeper deliberation. What's the difference between a fully digital dial, and a 'smart optimised' analog? What features will actually aid your day-to-day? And which would be totally useless? To answer these questions, and more, we've picked through the best smartwatches on the market to suit your no doubt very busy, hectic and urbane lifestyle.
The first digital watch, which debuted in 1972, was the Pulsar manufactured by Hamilton Watch Company. "Pulsar" became a brand name which would later be acquired by Seiko in 1978. In 1982, a Pulsar watch (NL C01) was released which could store 24 digits, making it most likely the first watch with user-programmable memory, or "memorybank" watch. With the introduction of personal computers in the 1980s, Seiko began to develop computers in the form of watches. The Data 2000 watch (1983) came with an external keyboard for data-entry. Data was synced from the keyboard to the watch via electro-magnetic coupling (wireless docking). The name comes from its ability to store 2000 characters. The D409 was the first Seiko model with on-board data entry (via a miniature keyboard) and featured a dot matrix display. Its memory was tiny, at only 112 digits. It was released in 1984, in gold, silver and black. These models were followed by many others by Seiko during the 1980s, most notably the "RC Series": During the 1980s, Casio began to market a successful line of "computer watches", in addition to its calculator watches. Most notable was the Casio data bank series. Novelty "game watches", such as the Nelsonic game watches, were also produced by Casio and other companies.
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.
You’d be amazed how hard it is to text something as simple as “hi” on many smart watch interfaces. Still, most designs take this into consideration. We tested all kinds of watches from auto-scrolling screens where you drew the letters with your finger to pre-smartphone layouts more akin to the alphanumeric layout of a payphone keypad. While the drawing features were nice, we felt that the texting was a little more manageable on keyboards.
Battery life and charging options: Charging your smartwatch is a hassle and the biggest downside to trading in your manually-wound or button battery-powered watch. A Fitbit Versa might last 3 - 4 days between charges, but a smartwatch like the Samsung Gear Sport or Apple Watch will need recharging every couple of days and sometimes every night if you are tapping on the screen regularly and using its apps.
The headline features are the new ECG monitor that unlocks the ability for serious heart health monitoring. It's been FDA cleared, so the feature can be used to detect heart rhythm irregularities - however, it's only in the US only for now. There's also a new fall detection mode that can let users access Siri to contact emergency services or a emergency contact. Apple's new smartwatch offers groundbreaking features and an improved design that makes it the standout option for iPhone owners right now.
Most smartwatches have a fitness component for the very good reason that a watch is moving with you throughout the day. For counting steps, encouraging activity, and tracking occasional long walks, runs, or bike rides, most smartwatches will do fine. If you want a device to track your everyday runs or cycling sessions, you want a GPS running watch. If you’re serious about tracking and improving your movement and sleep, a fitness tracker will do that for less money and look more discrete doing so (and if you have health insurance, you may get a discount or incentives to use one). There are smartwatches that lean heavily toward sports and fitness in their marketing, but there are drawbacks to each of them not found in a dedicated device. At the other extreme, if you all you really need is step counting, a hybrid smartwatch—with an analog face like a traditional watch, but with built-in motion sensors and months-long battery life—may be a better option.
I’ve had the Samsung Gear S3 classic for a few months now. There are lots of apps now available including a music app which allows you to save and play as many tracks as the sizeable built in memory will allow you to save to the watch. The in-built speaker is high quality for making and receiving calls and of course listening to music, but a Bluetooth headset makes all the difference.
Samsung's Galaxy Watch, a Tizen OS watch (starting at $329), is our favorite smartwatch for Android users. In addition to up to four days of battery life and a great design, the Galaxy Watch offers built-in GPS, heart rate sensor, water-resistance, Samsung Pay support, plus a nifty rotating bezel for navigating the interface. You can also download music from Spotify to the watch for offline listening. However, you get far fewer apps than you would with a Wear OS watch.