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.
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.
Waterproof to 165 feet and tested to military standards for durability, it includes features like a digital compass, altimeter, and barometer that you won’t find in most other smartwatches, as well as more standard tools such as GPS. The WSD-F20 can also function as a flashlight — handy in an emergency — and lets you download maps for offline navigation when you’re far from the nearest cell signal.
Samsung treads between smartwatch and fitness tracker, also packing in a heart rate sensor along with that GPS and its much-improved Samsung Health software. There's also the option of LTE (coming soon), if you wish for an untethered connection, with a standalone speaker for taking calls on the watch. It's now waterproof, too, adding swim tracking skills that are on par with the Watch Series 4.
How frustrating. I really -like- the idea of a smart watch... but it's so hard to find the right one. I'm not an exercise freak so heartrate monitors etc are useless to me. I really like the design of the Samsung watches with their bezels to control it, but the Tizen OS with it's limited apps puts me right off. The Access Grayson watch is beautiful, but the lack of NFC is a deal breaker for me - Google Pay with the convenience of a watch is part of the reason I'd buy one. I don't need to be able to put a sim in it... that's what my phone's for, but GOS would be nice for when I travel, and as a motorbike rider some level of waterproofing is a must. Guess I'm waiting for the next round of watches to see what's on offer.
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.
While internal hardware varies, most have an electronic visual display, either backlit LCD or OLED or Hologram. Some use transflective or electronic paper, to consume less power. Most have a rechargeable battery. Peripheral devices may include digital cameras, thermometers, accelerometers, pedometers, heart rate monitors, altimeters, barometers, compasses, GPS receivers, tiny speakers, and SD cards, which are recognized as storage devices by many other kinds of computers.
On-Screen Workouts/ Connected GPS/ Bluetooth/ Smartphone Notifications/ 4 Day Battery Life/ Heart Rate Tracking/ 15 Exercise Modes/ SmartTrack/ All-Day Activity/ Female Health/ Sleep Tracking And Stages/ Cardio Fitness Level/ 3-Axis Accelerometer And Gyroscope/ Optical Heart Rate Monitor/ Color LCD Touchscreen Display/ Water Resistant To 50 Meters/ Charcoal Woven Strap & Graphite Aluminum Finish
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.
All but the Martian Notifier claim some degree of water resistance: the LG, Samsung, and Motorola models can survive underwater up to 1 meter for 30 minutes, the Cookoo2 up to 100 meters, and the MetaWatch up to 3ATM, which is equivalent to 30 meters. Only the Martian and Motorola models claim to have scratch-resistant screens (the Martian has an anti-scratch acrylic crystal and the Moto 3 uses Gorilla Glass 3).
This watch won’t work unless you have an iPhone. However, it is hands-down the best smart watch for an iPhone. Other watches (including the Fossil Q Venture) will work with an iPhone, but won’t be able to answer calls or respond to texts, and if you want to customize the apps on your watch, you’ll need to navigate the Google Play store through the watch screen.
The hardware is now “swimproof” with improved water resistance and there’s also now a heart rate sensor. Those work with the new Google Fit app to improve the fitness experience from your watch. Further, the Falster 2 has built-in GPS and NFC as well. This opens up Google Pay functionality for the watch for mobile payments in-store. Of course, Wear OS is still at the center of the experience, and the whole thing runs on the Qualcomm Snapdragon Wear 2100.
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. 
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.