Apple has officially announced the availability of WatchKit, the software tools that developers will use for creating software for the Apple Watch coming in 2015. The company revealed last month that the SDK, or software development kit, would be released sometime this month. Apple says WatchKit enables developers to “create innovative WatchKit apps, actionable notifications and Glances, for timely information accessible by an easy, quick look at Apple Watch.” Additionally, resources within WatchKit reveal the screen resolutions for both Apple Watch sizes.

Alongside the release of WatchKit for developers, Apple has also published a new microsite with other Apple Watch-related resources Apple Watch design resources. The information is available for developers at developer.apple.com/watchkit.

Apple has also released the first iOS 8.2 beta following yesterday’s public release of iOS 8.1.1 for iPhone, iPad, and iPod touch.

The new developer resources do reveal the pixel resolutions for both the 38mm and 42mm Apple Watches: 272×340 and 312×390, respectively.

Apple first announced its upcoming Apple Watch alongside the iPhone 6 and iPhone 6 Plus at a special event held in September. The Apple Watch will debut next year with a starting price of $349 (and some think that could range quite a bit).

While Apple has thus far been quiet about the exact launch date of the Apple Watch, only saying ‘early 2015’, 9to5Mac recently reported that Apple’s head of retail Angela Ahrendts shared a ‘spring’ target with her staff.

For an overview of how WatchKit apps and Apple Watch will work, check out our first look at Apple’s new developer tools here.