An IPA file is a file format used to distribute and install iOS applications, including games, on Apple devices. IPA stands for iOS App Store Package. IPA files are essentially archives that contain the app's executable code, resources, and metadata.

To play FIFA 14 on a modern iPhone or iPad, you need one of two things:

containing the app’s binary, resources like graphics and audio, and metadata required for installation. For FIFA 14, the IPA file is the "installation disk" for an era of mobile football that many fans consider the series' peak. 2. Historical Significance and Delisting FIFA 14 was a landmark title, originally released as a free-to-download app

This is a gray area.