Monotouch is a platform that enables C#/.NET applications to run on iOS devices, providing a favorable alternative for those who prefer not to use Objective-C. It employs ahead-of-time compilation to create a single native binary that includes pre-generated ARM code and a JIT-less runtime, offering nearly complete coverage of the Apple iOS SDK. The document outlines the steps to develop, publish, and integrate applications using Monotouch, along with acknowledgments to Xamarin and the Mono team.