All smartphones have a home screen, which is the first thing you see when you turn the phone on. Apple, Microsoft, Google, and Palm have each taken a different approach to what they display on the home screen. For example, the iPhone home screen just displays icons to launch applications, while Windows Mobile displays information on the home screen. Android provides the best of both by allowing icons for launching applications and widgets for displaying information.
While I can describe each of the company’s approach in words, an even better approach is to show you on video, and that is what Brandon Miniman has done over on Pocketnow.com. The video does an excellent job of showing the different approaches each company has taken to what you see and how you interact with the phone when you first turn it on. I personally find the iPhone and Windows Mobile home screens to be too cluttered, and prefer Android’s approach.