IPA file basics
An IPA file is an iOS app package. It contains the files needed to install an app on iPhone or iPad when the package is signed and compatible with the target device.
Why repositories list IPA files
AltStore-compatible repositories publish metadata such as app name, bundle identifier, versions, download URLs, screenshots, and minimum iOS requirements. iappstores reads that metadata and turns it into searchable app pages.
What to check before downloading
Review the source repository, version date, minimum iOS version, developer name, and repository notes. iappstores does not verify or modify IPA files, so the original source remains important.