We all know that Processing is a snap to use on Android-- you can compile to an Android application directly from the Processing IDE.
However, a lot of visualists prefer iPad and Apple devices for its standardization, ease of use, and its form factor. Although Apple enforces its walled garden fairly rigorously, there are a few approaches to programming generative visuals on iDevices that make use of its robust support of HTML5 to enable JAVA and Processing based applications.
This demonstration shows how to build a standard, standalone Processing application and compile it to run directly on an iPad or even iPhone, using a combination of Processing for JS, XCODE, and HTML5 to iOS compilers. Programming environment is Mac OSX, Processing for Eclipse, and XCODE with the PhoneGap HTML5 compiler.