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:
Start with your prototype and possibly wireframes and then the correct template should jump out at you.
If this does not work for you, then:
If your app looks like 'Contacts', use Navigation-Based Application.
If you're writing a game (or something that looks like one), then OpenGL.
If you're writing something like 'Calendar', then use Tab Bar App.
Hope this helps.