An IPA file (iOS App Store Package) is the standard format used to distribute and install apps on iOS and iPadOS.
Always ensure you download IPA files from trusted sources. Sideloading apps from unverified providers can pose security risks to your device and personal data. kr2-iphone-appstore-telefonbuch-ipa
How to install an IPA on your iOS device: A guide - Median.co An IPA file (iOS App Store Package) is