Posts tagged with "apple watch"

The Electrodes Used by Apple’s ECG Watch App Enable Faster, More Accurate Heart Rate Measurements→

On 9to5Mac, Zac Hall breaks down how the new electrodes work in the Apple Watch Series 4 based on details published by Apple when it updated watchOS last week with the new ECG app. For now, the ECG app is only available in the US, but that doesn’t mean that others can’t benefit from the hardware that it uses. As Hall explains:

According to Apple, putting your finger on the Digital Crown to capture a heart rate reading also measures faster and with more accuracy as it updates every second versus every five seconds while the measurement is active.

That’s because placing your finger on the Digital Crown completes a circuit between your heart and arms that allows the Watch to record electrical impulses across your chest.

It will take time for the ECG app to gain the approval of regulators worldwide. However, in the meantime, it’s nice to know that the hardware that makes the ECG app possible is enhancing heart rate capture for everyone.

Permalink

Electrocardiogram App and Irregular Heart Rhythm Notifications Available Today

At Apple’s September keynote the company introduced the Series 4 Apple Watch. Among the features announced was a preview of the ability to generate an electrocardiogram or ECG within thirty seconds by placing a finger on the Digital Crown. At the time, Apple said the ECG functionality would ship in a software update ‘later this year.’

Today, with the release of watchOS 5.1.2, Apple has shipped the ECG app. As we explained in the MacStories Series 4 overview, the ECG functionality is enabled by new hardware including a new titanium electrode built into the Digital Crown:

This electrode pairs with another electrode built into the bottom of the Series 4’s new sapphire crystal back. When you place your finger over the top of the crown you form a closed circuit between your finger and the wrist of your other arm – where the back electrode is making contact.

Apple’s ECG sensor is notable because it’s the first of its kind available over the counter to consumers. ECG results taken with the Apple Watch are stored in the Health app, from which they can be exported as a PDF for sharing with your physician.

According to Apple’s press release:

The ECG app’s ability to accurately classify an ECG recording into AFib and sinus rhythm was validated in a clinical trial of around 600 participants. Rhythm classification from a gold standard 12-lead ECG by a cardiologist was compared to the rhythm classification of a simultaneously collected ECG from the ECG app. The study found the ECG app on Apple Watch demonstrated 98.3 percent sensitivity in classifying AFib and 99.6 percent specificity in classifying sinus rhythm in classifiable recordings. In the study, 87.8 percent of recordings could be classified by the ECG app.

watchOS has also been updated to notify users of irregular heart rhythms:

the irregular rhythm notification feature will occasionally check the user’s heart rhythm in the background for signs of an irregular heart rhythm that appears to be AFib and alerts the user with a notification if an irregular rhythm is detected on five rhythm checks over a minimum of 65 minutes.

The irregular heart rhythm notification feature, which is available for the Series 1 Watch and later, was likewise tested in clinical studies:

In that sub-study, of the participants that received an irregular rhythm notification on their Apple Watch while simultaneously wearing an ECG patch, 80 percent showed AFib on the ECG patch and 98 percent showed AFib or other clinically relevant arrhythmias.

The new Apple Watch ECG app and irregular heart rhythm notification feature are available as part of watchOS 5.1.2, which can be downloaded from the Software Update section of the Watch app on your iPhone.

Developers Show What They Could Make if Apple Opened Up Watch Face Development

Last week we linked to Marco Arment’s article critiquing Apple’s watch faces and calling for Apple to open up watch face design and development to third parties. By the next day, Steve Troughton-Smith had an Xcode project up and running that uses SpriteKit to simulate custom watch faces. Troughton-Smith posted pictures of the watch faces he created on Twitter, which drew a lot of interest from other developers.

Troughton-Smith uploaded his watch face project to GitHub, and in the days that followed, developers, including David Smith, who’s been making Apple Watch apps for his health and fitness apps since the Series 0 was introduced, began playing with Troughton-Smith’s code. Writing about the experience on his website Smith said:

There is something delightful about solving a problem that is superficially so simple and constrained. The constraint leads to lots of opportunities for creative thinking. Ultimately you just need to communicate the time but how you do that can take countless different forms. It reminds me of the various ‘UI Playgrounds’ that have existed in app design. For a while it was twitter clients, then podcast players and weather apps.

I spent the weekend following along as Troughton-Smith, Smith, and others designed all manner of personalized watch faces. The experience reminds me of the flurry of activity and excitement during the first months after the iPhone was released when developers reverse-engineered Apple’s APIs to create the first jailbroken apps even before there was an App Store. Let’s hope that history repeats itself and Apple opens up watch face development to third parties like it did with apps.

Below and after the break, we’ve collected tweets following Troughton-Smith’s work and showing off some of the designs that have been created over the past several days.

Read more

Apple Watch Face Legibility→

In a post on Marco.org, Overcast developer Marco Arment critiques the design of many of the current Apple Watch faces. Using a variety of analog watches as references, Arment highlights the design elements that make them legible, few of which are followed by Apple’s faces:

Across a wide variety of brands, styles, and price points, a few key design principles are clear:

  • The hour markers for 12 (and often 3/6/9) are more prominent.
  • The hour indices are much larger than the minute markings.
  • The hour hands nearly touch the hour indices.

These all improve legibility by making it as fast and easy as possible to know which hour is being indicated (and minimize the chance of an off-by-one error), first by orienting your eyes to the current rotation with the 12 marker, then by minimizing the distance between the hour hand and the indices it’s between.

Arment is especially critical of the Infograph face, which is so hard to read that many people have resorted to using a digital time complication with it. He concludes that it’s time for Apple to allow third parties to create watch faces.

We covered our Apple Watch faces on AppStories this week, and both Federico and I noted that we use a digital time complication with the Infograph watch face because the hands are so hard to read. As Arment’s piece points out, that isn’t uncommon, but it shouldn’t be necessary and is a pretty clear indication that the design is flawed. I’ve been happy with the Series 4 Watch’s support for more complications, but I also want more face options and flexibility across watch faces. It’s time for Apple to re-evaluate its current watch faces and reconsider letting developers create faces of their own.

Permalink

Daily Dictionary’s New Watch App Showcases the Latest watchOS Capabilities

Developer Benjamin Mayo released an update this week to his new word of the day app, Daily Dictionary. Version 1.2 adds an Apple Watch app, making it easy and convenient to view each day’s featured word from your wrist.

Daily Dictionary’s Watch app is particularly noteworthy due to its complications for the Series 4’s Infograph faces, and its custom UI for notifications. For complications, you can use a smaller option containing the app’s logo which serves as a launcher, or you can select a larger complication that includes the logo alongside the word of the day itself. If you’d like it to, the larger complication can also display the current date, saving you the need for a separate date complication elsewhere on the face.

One of the ways Daily Dictionary can provide its featured word each day is through a push notification, and if you have the new Watch app installed, you’ll get to see a custom notification UI that reflects the design of the full iOS app. Watch developers can take advantage of APIs that enable crafting more customizable notification interfaces, and Daily Dictionary is a great example of that. Now that the Apple Watch is becoming a more mainstream product, and since one of the Watch’s chief strengths is as a notification conduit, I hope we see lots of apps follow Daily Dictionary’s example in providing more creative Watch notifications.

Daily Dictionary is available on the App Store.

Apple’s Watch Face Problem→

Jason Snell today published the article I’ve been itching to write, outlining the current mess that is Apple’s watch face ecosystem. The Apple Watch in so many ways is in its best position ever, which makes the lack of coherence in Apple’s watch face strategy particularly surprising.

As Apple continues to create new watch faces at a regular clip, those faces have grown more and more fragmented in what they can do. The Siri face introduced last year was an interesting new direction for watch faces, yet it remains one of a kind in many ways. The Series 4 Watch’s Infograph faces come with a whole new set of complications, all of which are wonderful except that they don’t work on other faces, nor do older complications work on the new faces. This lack of compatibility is frustrating enough, but what may be even more vexing is that Apple itself hasn’t even provided new complications for all of its apps, only some of them – I’d love a Podcasts complication on my Infograph face, but it simply doesn’t exist.

Snell offers up a handful of suggestions for where Apple should focus its watch face efforts going forward, all of which earn my total agreement. He writes:

Every face needs to be modernized and support the new complication styles, at least on Series 4. Key system apps and features like Messages and cellular status should be available on all faces. Every face design should be more flexible.

And moving forward, Apple should allow developers even more power in building complications. Complications should be able to appear when they have something to say and disappear when they don’t—for example, I’d love for a Timer complication to appear when I’m running a timer, but the rest of the time I’d rather not see it. If complications truly are the best face of Apple Watch apps, the developers of those apps need more power to build good ones.

Every one of these ideas is entirely reasonable, and would go a long way toward fixing the current watch face mess. I know we just got watchOS 5, but I hope watch faces are a strong area of focus for Apple in next year’s watchOS 6.

Permalink

Overcast 5.0.2 Adds New Series 4 Complications, More Siri Shortcuts

Following a major update that introduced a redesigned Now Playing screen, extensive shortcut support, and standalone Watch playback, Marco Arment has brought a variety of enhancements and fixes to version 5.0.2 of Overcast, released earlier today.

Overcast 5.0.2 has added new round complications for the Infograph faces on the new Apple Watch; these act as launchers that simply open the Overcast app on the Watch, which I find convenient enough. Furthermore, you can reduce the amount of haptics used by the app to communicate certain actions (I love haptic feedback in Overcast, so this option isn’t for me), and there are new options for configuring how the ‘Send to Watch’ feature works.

New shortcuts in Overcast 5.0.2.

New shortcuts in Overcast 5.0.2.

Most of all though, I’m interested in the new Siri shortcuts supported by Overcast. The app now offers shortcuts to activate or cancel the sleep timer, as well as two shortcuts to copy the current episode’s standard or timestamped link to the clipboard. The ability to quickly generate an Overcast link for the episode you’re listening to is a perfect use case for shortcuts: it removes repetitive interactions with the app and, with the tap of a button or Siri phrase, it gives you a link you can instantly share with others.

For the occasion, I’ve turned my original Overcast Chapters widget shortcut into Overcast Controls, an enhanced widget that, besides chapter navigation, now uses the app’s new shortcuts to let you copy episode links too. You can download it below.

Overcast Controls

Navigate chapters or copy links for the Overcast episode you’re currently listening to. Best used as a widget.

Get the shortcut here.