Apple provides the WatchKit software to developers and with the help of this developers can create the design for Apple Watch effortlessly. It was announced on dated November 18, 2014 in CUPERTINO, California. Apple Watch apps represent the View in the Model-View-Controller design pattern. And also if the View in Apple watch app,then Model and Controller reside in iPhone app. The working of Apple Watch like that-If apple watch has a button then the action associated with that button is sent to the iPhone app, which responds to the event with view updates.There are several UI elements available to build your app: labels, images, groups, tables, buttons, switches, sliders, maps and menus. Since the goal is to keep the interface simple you can enhance the interactions by providing single or paged modal sheets or even context menus.In a Watch app developers cannot create view hierarchies like developers create in iPhone app. Instead, simply add UI elements and they are stacked vertically and at runtime they are laid out based on the space available.

Developers can create modern WatchKit apps, which have actionable notifications and flicker for updated information and work with new technologies like Taptic Engine, Force Touch and Digital Crown.Philip Schiller, Apple’s senior vice president of Worldwide Marketing Said,  “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”.

The Apple Watch can also receive notification like the iPhone app can receive local or remote notifications.The developer can send notification that make available to users change time of their journey when a train or bus is late. On tap notifications subtly let you know when and where your next meeting starts, what current traffic conditions are like, even when to leave so you’ll arrive on time.

The Apple Watch also includes the American Airlines app that informs the Travelers about their real-time location. The travelers simply have to say ‘Where am I?’ in-flight and get real-time location information at 10,000 ft.”.  John Gustafson, American Airlines vice president of Digital said, “The app on Apple Watch reminds you when it’s time to head to the airport via pre-trip notifications, and provides updates for gate changes, connecting gate info upon arrival, and will notify you when boarding begins if you’re not at the gate yet.”

Apple Watch provides us the facility to convey live scores and information about games. This gives the real time experience as users receive alerts on score change. Apple Watch also makes the Instagram experience more intimate and in the moment, with Instagram news and watch list permit you to follow new accounts and get a real-time view of your likes and comments, also see your friends latest photos.

Developers are able to create fully native apps for Apple Watch. The iOS 8.2 SDK or later including WatchKit is available Watch requires iPhone 5 or later. App features may not be available in all regions or all languages.