Combing through Apple's publicly available documentation released today (part of the WatchKit SDK), The Verge has learnt quite a few 'new' things about the Apple Watch. The company's first Smartwatch will come in two different sizes, each having a retina display. The 38mm Apple Watch will have a 272 x 340 pixels display, whereas the larger 42mm Apple Watch will sport a 312 x 390 pixels display. Both displays end up with the same pixel density, as well as the same 4:5 aspect ratio.

Native apps for the Apple Watch are coming in 2015, just that they won't be available until a few months after the launch. Apps on the Apple Watch will only complement an iOS app. Most (almost all) of the processing will be done in the WatchKit extension, i.e. connected iPhone. Information will be passed along between the iPhone and Watch. Every tap, every message, will be communicated between the two connected devices.

So, for the Apple Watch to be of any real use, an iPhone will be required at (almost) all times, except when you only want to check the time. Native apps will run locally on the Apple Watch.

Apple is giving away the font - Sans Serif typeface - being used on the Apple Watch for free.

Apps have a tight restriction in terms of space; only 20 MB of image resources can be stored locally. Beyond that, assets will be streamed in from the iPhone. Also, videos are not supported, although the Apple Watch will be able to display GIFs.

The Apple Watch can display two types of notifications. "Short Look" is a brief glance at the app name, icon and some basic information. "Long Look" will activate if the wearer holds his/her wrist up for a little longer, displaying additional information on the Watch face.

The Apple Watch will go on sale in early 2015. An exact release date hasn't been announced yet.