The archive format commonly used for distributing applications intended for Apple’s mobile operating system is structured as a ZIP archive. It contains the application bundle, along with additional metadata and resources. This format serves as the package file to be installed on devices running that OS. For example, a developer might create one of these archives to distribute a beta version of their application to testers before it is released on the App Store.
This particular file type offers several advantages. It enables distribution of applications outside of the official App Store, facilitating beta testing, enterprise distribution, and the sharing of homebrew applications. Historically, its accessibility allowed developers greater control over the distribution process and provided users with options beyond the curated App Store environment. This also bypasses certain restrictions imposed by the App Store, enabling functionality and content that might otherwise be prohibited.