One of the best features of PhoneGap is that it allows you to create a cross-platform app using the same code base. It means that you can reuse most of the code, but you still have to build the app for each target platform. You can do this by configuring the development environment for each platform you want to support or you can use online services such as PhoneGap Build services (http://build.phonegap.com) or Icenium (http://www.icenium.com/). Both are cloud-based services; the main difference is that the PhoneGap Build service supports all the platforms, whereas Icenium supports only the Android and iOS platforms but does come with a very nice online editor. Once the builds are ready, you have to follow a different workflow for each target platform.