New iPhone App - How to Choose which Xcode Template to Use?

Question

In general I'd like to understand which templates to use when, when I'm making new iPhone apps. Could anyone offer some guidelines, tips, rules-of-thumb?

Also, how much should I agonize over this? If I start off with the wrong one, can I add the missing pieces manually, is it hard?

For reference here are the choices I'm seeing:

• Navigation-Based Application
• OpenGL ES Application
• Tab Bar Application
• Utility Application
• View-Based Application
• Window-Based Application

Answer 1

In iPhone Development Quick Start, from Apple, you have a brief description of each:

• Navigation-Based Application. An application that presents data hierarchically, using multiple screens. The Contacts application is an example of a navigation-based application.
• OpenGL ES Application. An application that uses an OpenGL ES–based view to present images or animation.
• Tab Bar Application. An application that presents a radio interface that lets the user choose from several screens. The Clock application is an example of a tab bar application.
• Utility Application. An application that implements a main view and lets the user access a flipside view to perform simple customizations. The Stocks application is an example of a utility application.
• View-Based Application. An application that uses a single view to implement its user interface.
• Window-Based Application. This template serves as a starting point for any application, containing an application delegate and a window. Use this template when you want to implement your own view hierarchy.