Apple Seeds iOS 8.2 With WatchKit SDK for Apple Watch Apps to Developers

Apple today announced that its set of WatchKit development tools are now available for developers, allowing them to begin creating apps and software for the company's upcoming Apple Watch.
"Apple Watch is our most personal device ever, and WatchKit provides the incredible iOS developer community with the tools they need to create exciting new experiences right on your wrist," said Philip Schiller, Apple's senior vice president of Worldwide Marketing. "With the iOS 8.2 beta SDK, developers can now start using WatchKit to create breakthrough new apps, Glances and actionable notifications designed for the innovative Apple Watch interface and work with new technologies such as Force Touch, Digital Crown and Taptic Engine."
WatchKit is being released as part of the iOS 8.2 and Xcode 6.2 beta, both of which have been made available to developers today.

Both the iOS 8.2 Beta with WatchKit and the Xcode 6.2 beta can be downloaded from Apple's developer site, which also has Apple Watch development resources for developers. WatchKit can currently be used to create Glances, actionable notifications, and Apple Watch apps that are powered by the iPhone. Many Apple Watch apps will be driven by code that runs on the iPhone, with a UI that displays content on the watch itself. According to Apple, "fully native" Apple Watch apps can be created "later next year."

As described by Apple, actionable notifications are notifications that allow users to take an action or respond directly from their wrists with the Apple Watch, turning off the lights when they've left the house, for example, or accessing flight information at an airport. Glances are somewhat simpler, aiming to give users quick information at a glance like news, weather, sports scores, and more.

In its press release, Apple highlights several developers who have already begun working with WatchKit, giving some additional insight into how the WatchKit tools can be used. The ESPN app for Apple Watch delivers live scores and information on teams, according to ESPN VP John Kosner, and it offers snapshots of live games through Glances and alerts on score changes through actionable notifications.

Instagram has used WatchKit to develop actionable notifications that let users instantly like a photo or respond with an emoji, plus there's an Instagram news and watch list to let users see their friends favorite photos and get an overview of likes and comments. American Airlines has used Apple Watch to create pre-trip notifications, updates for gate changes, gate connection information, and alerts when a flight begins boarding, all of which can be accessed directly from the wrist.

In addition to sharing these use cases for the Apple Watch, Apple has also created a dedicated Apple Watch site for developers, outlining the difference between full apps, Glances, and actionable notifications, offering download links to the iOS 8.2 beta with WatchKit SDK, and providing design guidelines and templates.

Apple has said that its Apple Watch will be released in "early 2015," but an exact launch date remains unclear. At the lower end, the device will retail for $349, with estimates placing pricing for the higher-end solid gold version at thousands of dollars.

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Tag: iOS 8.2
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Top Rated Comments

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68 months ago

Hopefully this will tell us what resolution and PPI is on the Apple Watch.

I just confirmed the 38mm watch UI size is 136w x 170h and the 42mm watch UI size is 156w x 195h.

Those are in points by the way, so the native resolution will be 2x most likely:
38mm: 272w x 340h Px
42mm: 312w x 390h Px

Edit: Confirmed 2x will indeed be used: "Create all of your image resources as @2x images. There is no need to include non @2x resources in your Watch app bundle."

Rating: 15 Votes
68 months ago

@PanguTeam can start ripping it apart looking for exploits.
Rating: 7 Votes
68 months ago

Does it mean that it is retina?

At 2x, the 38 mm is 582.08 PPI and the 42 mm is 604.09 PPI.
Rating: 5 Votes
68 months ago
"Starting later next year, developers will be able to create fully native apps for Apple Watch."

Later next year?
Rating: 4 Votes
68 months ago

As I said, the pixel dimensions are 312x390, the point dimensions are 156x195 (for the larger size of course). This is running in the simulator with Xcode 6.2. Their catalog app uses the following code to output the image I posted earlier.

CGRect bounds = [[WKInterfaceDevice currentDevice] screenBounds];
CGFloat scale = [[WKInterfaceDevice currentDevice] screenScale];

Yes I know, and I also said I updated my post to show the correct values.
Rating: 3 Votes
68 months ago

I have the simulator running right now and it's reporting a screen bounds of 156x195 with scale of 2x.

I got my information from Apple's Photoshop files they released today. That would make the resolution half then of what those documents show. I edited my original post to show the correct values then.
Rating: 3 Votes
68 months ago

This is not accurate. The resolution is pixels, not points.

Completely accurate if you read the post. For devs, we're concerned with the points, not pixels..

"Those are in points by the way, so the native resolution will be 2x most likely:
38mm: 544w x 680h Px
42mm: 624w x 780h Px"
Rating: 3 Votes
68 months ago

well .... this is gona suck the battery out of the Phone ...
And why would Apple Limit themself of selling Watches only to people with an iPhone .... sounds short sighted

Reminds me of when the iPhone came out and you had to pair it with itunes for all sorts of things ... then they cut the cable a gen or two after and iPhone was much better experience.

Bad move Apple ...

What are you talking about? Do you have any idea how the thing works?

The iPhone is a huge part of it. Not only is it how it LOADS content onto the device in the first place, 90% of the tasks are interacting with your iPhone, using your iPhone to communicate, or using one of the iPhone's sensors.

Without the iPhone portion, the device is nothing. Your post is what I would call shortsighted.
Rating: 3 Votes
68 months ago
Very interesting...the docs state that all third-party Apple watch apps actually run on the paired iPhone, and only the user interface is displayed on the Apple Watch. All the logic and app behavior actually runs on the iPhone. User interface resources, like graphics or images get loaded on the watch, but no code.

So: third-party Apple Watch apps will not run if your iPhone isn't present, or if the connection to the iPhone is disrupted in some way.
Rating: 3 Votes
68 months ago


@PanguTeam can start ripping it apart looking for exploits.

Who? Why does anyone care about exploits? They'll get patched anyway.
Rating: 3 Votes

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