Once you’re satisfied with the whole customization you’ve completed within the site, you can give the theme a name and then press the Compile Theme button. After the theme compiling process completed, you will be able to view how the theme looks like, download the zipped file along with the instruction on how to install the theme on your iPhone.

Install custom themes on Apple iPhone

The iPhone theme that you have created using iPhone Theme Maker can be installed using Summerboard, an extension to the iPhone’s SpringBoard user experience that adds numerous interesting features to your iPhone like scrolling icons, themes and wallpapers.

You can get SummerBoard just by installing AppTapp in your iPhone and then install Summerboard at no cost whatsoever. However, If you’ve upgraded to firmware 1.1.1, Summberboard must be installed manually.

Or, if you aren’t convenient with the above method, you can download Pxl Installer Package and install the package using applications using iBricker for Windows and Breezy for Mac.

via Free Online iPhone Theme Maker to Create Your Own Theme

Note: The link to online iphone theme maker has been removed because the service has down.