Er, almost. Your app provides a "Default.png", which is shown at initial app launch. This often contains either a loading image or a prerendered screenshot of y

Er, almost. Your app provides a "Default.png", which is shown at initial app launch. This often contains either a loading image or a prerendered screenshot of your app with a blank state. However, since iOS4 and "backgrounding" (which imho is a better example or using hacks to give the appearance of speed), Apple will also dynamically snap a screenshot of your app at the time you close it, so that re-opening it feels instantaneous and more like "switching" to an app.