Apple today seeded the fourth beta of iOS 8.2 to developers, nearly a month after seeding the third beta and more than two months after releasing the first iOS 8.2 beta.

The beta, build 12D5461b, is available immediately to registered developers as an over-the-air update and it can also be downloaded from the iOS Developer Center. Today’s update also includes Xcode 6.2 beta 4 with WatchKit.
iOS 8.2 includes the WatchKit SDK, allowing developers to create apps, Glances, and notifications for Apple’s upcoming wearable device ahead of its 2015 launch. The first iOS 8.2 beta, with WatchKit SDK and developer documentation, revealed several new details about the Apple Watch, including its heavy reliance on the iPhone and the different types of content developers can create for the device.
The iOS 8.2 update has been widely expected to be released in conjunction with the launch of the Apple Watch and the fourth iOS 8.2 beta adds new evidence to support that theory.
In the Bluetooth section of the Settings menu on the iPhone, there‚Äôs now a mention of the Apple Watch, advising users to open the “Apple Watch app” to pair an iPhone with an Apple Watch. The Apple Watch iPhone app will likely be used to allow Apple Watch wearers to control settings on the device from their iPhones.

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.
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.