An (iOS App Store Package) is the archive file containing an iOS app. It’s the equivalent of an Android APK.
While you can technically find legacy .ipa files for version or older on third-party archive sites, they are functionally obsolete: whatsapp ipa for ios 7.1.2
Download WhatsApp IPA for iOS 7.1.2: A Comprehensive Guide An (iOS App Store Package) is the archive
For users determined to access their messages on an iPhone 4, the following legacy methods are frequently discussed: How to Install GB WhatsApp (Watusi) on any iPhone whatsapp ipa for ios 7.1.2