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.

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 Asus ZenWatch 3 was a previous top pick for a Wear OS smartwatch. As of now, it has reached the end of its Wear OS updates (after a very long delay getting to Android Wear 2.0). Its rotating crown does not actually work to turn or scroll anything on the screen. Its proprietary watch band connections mean that your options are limited to what is available from third parties on Amazon. And the watch is hard to find new.
Plus, these smartwatches are made by Fitbit, so they’re incredible fitness and health trackers. They both offer 24/7 heart rate tracking, on-screen workouts with Fitbit Coach, over 15 exercise modes, GPS (Connected GPS in the Versa’s case), and swim tracking thanks to their 5ATM rating. There’s also room to store your music, as well as Fitbit Pay support (Ionic and Special Edition Versa only).
As of 4 September 2013, three new smartwatches have been launched: the Samsung Galaxy Gear, Sony SmartWatch 2,[62] and the Qualcomm Toq.[63] PHTL, a company based in Dallas, Texas, completed is crowd-funding process on Kickstarter for its HOT Watch smartwatch in September 2013. This device enables users to leave their handsets in their pockets, since it has a speaker for phone calls in both quiet and noisy environments.[64] In a September 2013 interview, Pebble founder Eric Migicovsky stated that his company was not interested in any acquisition offers,[65] but revealed in a November 2013 interview, that his company has sold 190,000 smartwatches, the majority of which were sold after its Kickstarter campaign closed.[60]
Samsung’s three second-generation smartwatches arrived with real improvements and refinements. At $300, the Gear 2 is the most sophisticated—and expensive—of the trio. The Gear 2 Neo is basically a less expensive version of the Gear 2: It has similar functionality, but it's housed in a plastic body instead of metal and has no built-in camera. And the slimmer Gear Fit is a hybrid smartwatch and activity tracker.
The touchscreen, button, and dial (what Apple calls the “crown”) help you zoom in and out and move between apps fairly effortlessly. With this easy navigation it’s easy to forget we’re typing on a screen slightly smaller than an Oreo. In particular, we loved Apple’s app homepage, which displays all of the apps as icons in a honeycomb-like display. You can use the touchscreen to move around, and the dial to zoom in or pan out, to precisely tap on the one you want.

For all of you outdoorsmen, Casio returned to IFA this year with its latest Pro Trek watch. The Casio WSD-F30 takes the same great features of previous generations and slaps them inside of a slightly slimmer body. The 60.5mm × 53.8mm × 14.9mm body is still pretty huge, but it’s considerably smaller than what came before it and still maintains 5ATM water resistance, MIL-STD-810, and even low-temperature resistance.
Built-in GPS and a great workout coach make the Huawei Watch 2 a great companion on long runs and intense workouts. You can leave your phone behind, too, thanks to onboard music storage and the ability to connect Bluetooth headphones to the watch. Like the LG Watch Sport, the Huawei Watch 2 has an LTE version, but unfortunately, Huawei isn't selling that model in the US yet.
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.
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