The term refers to iOS application archive files, a package file format used by Apple’s iOS operating system. This archive contains the application’s compiled code, resources, and metadata, essential for distributing the application to iOS devices such as iPhones and iPads. As an example, a developer compiling their application for testing on a specific device will often produce such a file.
These files serve a critical role in the iOS app development and distribution ecosystem. They enable sideloading of applications, facilitating testing and deployment outside of the official App Store. Their existence allows developers to share and install applications directly onto devices, offering a distribution avenue that circumvents the standard App Store review process. Historically, these files have been essential for beta testing and enterprise application deployments.