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If you have an interest in learning, time to invest in exploring and practicing with Apple’s developer tools, and an Intel Macintosh computer, you have everything you need to begin developing for the iPhone.
Developing an application for the iPhone won’t happen overnight, but with dedication and practice, you can be writing your first applications in a matter of days. The more time you spend working with the Apple developer tools, the more opportunities you’ll discover for creating new and exciting projects.