How to Create an iPhone Application: 11 Steps - wikiHow

iPhone Application Development is the process in which an application is built using the iPhone SDK, published on Apple Inc.'s iTunes Store (App Store) and made available for use on the iPhone, iPod Touch or iPad.
STEPS

1

BE SURE THAT IT FITS INTO A PREDEFINED CATEGORY.
METHOD 1 OF 1: DO YOU HAVE A UNIQUE IDEA?

1

REVIEW THE LIST OF CURRENT APPLICATIONS TO SEE WHAT IS OUT THERE AND SEE HOW YOURS WILL BE DIFFERENT.

2

DECIDE IF YOU WILL DO IT YOURSELF OR HAVE IT DONE.
Find a consultant or vendor that will build your application for you.
Gather the correct hardware and software
Currently, development is only possible on a computer running Mac OS X Leopard.

3

OBTAIN BACKGROUND IN OBJECTIVE-C
OBJECTIVE-C IS BASED ON THE C (PROGRAMMING LANGUAGE)

4

DOWNLOAD THE IPHONE SDK

5

FOR QUICKER DEVELOPMENT YOU CAN BUY EXISTING APPLICATION BUILDERS OR FIND SOME FREE ONES AVAILABLE.

6

TO MAKE YOUR APPLICATION AVAILABLE YOU HAVE TO PUBLISH IT ON THE APP STORE.
RESOURCES
Cocoa Heads
Apple's Application Development Reference Guide