Trending about Apple watchOS

Reviewed by Julianne Ngirngir

I've been testing wearables for years, and I've always been fascinated by the mountain of data they collect. Heart rate, blood oxygen, sleep stages—the sensors keep getting better, but here's what caught my attention: Apple just dropped research suggesting that how you move, sleep, and live might be more telling than any biometric reading your watch can take. This isn't just another incremental sensor upgrade—it's a fundamental shift in how we understand health monitoring.

There's a feature that every Apple Watch owner should know about — one that makes navigating menus, tapping tiny icons, and interacting with complications, among other things, much easier on the small display.

When you need to subtly glance at the time or check your workout metrics without raising your wrist, the always-on display (AOD) on your Apple Watch comes in handy. However, Apple makes it seem impossible to disable it temporarily. You either choose to leave it on or off, with no clear way to shut it down for a while. It might not be obvious, but there is a shortcut that can do just that.

The Apple Watch is rapidly becoming a standalone device that you can use without an iPhone or internet connection, and Deezer and Spotify have just helped make that even more true by adding support for offline playback on the watch.

If you're a fan of sending audio messages on your iPhone, you might be disappointed when tapping the microphone button in the Messages app on an Apple Watch. You'll see it when crafting a message, but it won't send any audio because it's for Dictation, which turns your speech into text. If you'd rather use it to compose and send audio clips, there's a way to do just that.

When you think about your Apple Watch, what comes to mind? Fitness tracking? Replying to texts? There are a lot of things Apple Watch is good for, but social media doesn't appear to be one of them based on the App Store. If that's your perception, however, it's time for a reality check because you can start browsing Twitter and Reddit on your Apple Watch right now.

In the case of Apple Watch v. Fitbit, the winner comes down to the judge at hand. Apple currently offers two smartwatches — the Series 5 and the Series 3 — while Fitbit offers three models — the Fitbit Versa 2, Fitbit Ionic, and Fitbit Versa Lite. Whatever your assumptions about these devices are, throw them out the window, as each has something unique to bring to the table.

Apple Watch owners know the struggle — it's the end of the day, and those rings aren't met. Whether you forgot your watch before hitting the gym, let the battery run out, or just didn't move enough, you could feel the sting of fitness failure. But it doesn't have to be this way. You can actually close your Activity rings yourself; it just takes a little know-how.

Your Apple Watch sends you notifications from friends, family, and the apps that are important to you. Occasionally, however, the watch may scare the heck out of you with a notification warning of an abnormal, elevated heart rate. If you have no history of heart conditions, this alert might come as a shock. Why do you have a high heart rate, and what are you to do with the information?

Waking up your Apple Watch to see "your heart has shown signs of an irregular rhythm suggestive of atrial fibrillation" might come as a shock. While your watch can send you warnings if it detects a fast or low heart rate, those messages are pretty vague, while the abnormal arrhythmia alert can downright scary. So what should you do if you receive one of these AFib notifications?

Considering how the Apple Watch works as an extension to your iPhone, it would've seemed like a no-brainer to include the ability to view your iPhone's battery life from the Watch, but in true Apple fashion, they did not.

With the first wave of Apple Watches being received today, you're probably busy setting yours up and playing with all its features.

The Apple Watch may be a much simpler device than your iPhone, but that doesn't mean it's free of bugs, glitches, and crashes just like your other devices. A common problem that you'll run into is a frozen screen due to a malfunctioning app. While this can be frustrating, the solution can be as simple as a quick reboot.

For all that money spent on a new Watch, Apple could've given us more than just a charger and its case. I mean, the case is nice and all, but what realistic use is there for it? In all honesty, it'll probably find its way onto a shelf high above in the closet—but it doesn't have to.

Accessing and getting in touch with your favorite contacts has never been easier thanks to the "Friends" feature on the Apple Watch. However, this only applies to users who are running watchOS 2.2.2 and lower. When Apple issued watchOS 3, the "Friends" option was completely removed. So if you're running watchOS 3 or higher, you won't be able to follow these instructions.

As you're probably well aware by now, the Apple Watch isn't just for sending text messages and checking Instagram—you can also use it as your wallet. With Apple Pay compatibility, you can use your Watch to make purchases at any retailer that accepts the payment service.

Apple Watch doesn't include a multitasking feature like its iPhone companion, so there's no way to show active apps or swipe up to force-close one. Watch is an extension of the iPhone, not a replacement, so including a fully-functional multitasking feature seems impractical.

On the Apple Watch, along with the conventional emojis we've grown to love, there are new animated emojis that add a new dimension of fun for you and your friends. Unbeknownst to many, these animated faces also include a feature that allow you to change their color.

It probably doesn't happen much, but occasionally you'll run into a frozen or bugged-out app on your iPhone or other iOS device. That's where force-closing comes in, allowing you to close any app manually through a few clicks and swipes.

Depending on how many Watch-compatible apps you have, the Home screen on your Apple Watch is either insanely clean or absurdly messy. When I first synced my Watch with my iPhone, I was attacked with a huge honeycomb of apps, strewn across my Home screen in no particular order.

The display on the Apple Watch is way too small to even attempt typing on it, which is why the Messages app only allows for responses using default replies or by speaking a message. But you won't always be able to speak a message, and often the default replies will be too generic to want to use.

While the Apple Watch does have up to 18 hours of battery life each day on a full charge, your results will vary depending on how often you use it and what you're actually doing with it.

While some of the additions to the emoji keyboard in iOS 8.3 have been criticized for actually doing the opposite of their intended purpose, they've been well received overall. But the biggest winner of the new emojis was one that actually wasn't even released—the "Vulcan salute" emoji.

With audible alerts and subtle vibrations, the Apple Watch makes it difficult to miss incoming notifications. But soon enough you'll realize that not every notification is worth receiving on your Watch and can ultimately render the experience annoying under particular circumstances—like when your popular Instagram post floods in notification after notification.

With the high rate of obesity in the United States, it's fantastic to see the massive wave of fitness tools available, even if it's just a trend. And with the companionship of your Apple Watch, keeping track of your progress or fitness goals has never been easier. As my LA Fitness intercom repeatedly announces, "What gets measured gets improved." (Corny, but very true.)

There are more ways to wear an Apple Watch than just the default one.

There's a recently discovered flaw by iDownloadBlog that lets thieves reset a stolen Apple Watch without a hitch, which is the result of Apple not including the Activation Lock feature that iPhones have had since iOS 7.

I've called 911 accidentally more than a few times on my iPhone using the Emergency SOS triggers, but it's also just as easy to trigger an unintentional call to emergency services using an Apple Watch. These accidental 911 calls can put a strain on local public-safety answering points, or call centers, as well as local authorities and emergency medical technicians.

When you can't reach your iPhone or don't have it on you, how do you get help from emergency services? Unless you have one of those life-alert mobile triggers, someone nearby, or some amazing telepathy skills, hope might be the only answer — unless you wear an Apple Watch, that is.

Using a passcode on your Apple Watch is a good way to keep other people out of your data, but what happens when you see that "Wrong Passcode" screen yourself? You can, of course, try again in a minute, but if you've forgotten it for good, there's still a way to get back into your Apple Watch.

While there isn't as much personal data residing on your Apple Watch as there is on your iPhone, it's still a good idea to set a passcode for it and lock it up when you're not using it. If you don't, while it's charging or otherwise off your wrist, others may be able to sneak a peek at your activity, messages, emails, and other personal details. Plus, you won't be able to use Apple Pay without one.

Not to be outdone by the announcements of Mac OS X El Capitan and iOS 9, the Apple Watch is also getting a much needed software update. Some of the notable new features we can look forward to on watchOS 2 are Nightstand mode, additional screens for friends, email replies, and other improvements we probably should have already had.

To take group shots and better selfies on your iPhone, you can use your Apple Watch as a remote shutter for the Camera app—but what if you want to take a snapshot or video with a different app?

With only a few days until Apple Watch preorders begin, and just a couple of weeks until its official release, the biggest question in Apple Land seems to be: "Are you going to get an Apple Watch?"

Apple's new Watch models go on sale April 24th in Apple Stores everywhere, and can be preordered online starting April 10th. If you're set on preordering one, how do you know which size to choose?