- The document discusses using Titanium and Alloy for cross-platform native app development with JavaScript. - Titanium is a JavaScript SDK that allows building native iOS and Android apps. It generates true native code instead of wrapping webviews. - Alloy is a MVC framework built on top of Titanium that makes apps easily styleable, extendable, and shareable across components. - While cross-platform development shares around 90-95% of code, there are still platform differences like navigation patterns that require some platform-specific code or filters.