Distributing modified IPAs violates Apple’s Developer Program License Agreement and WhatsApp’s Terms of Service. However, end-user sideloading exists in a legal gray area in many jurisdictions, with the EU’s Digital Markets Act now requiring third-party app store support on iOS (effective 2024), potentially changing this landscape.
An IPA file is a compressed folder (ZIP) containing all the code, resources, and metadata of an iOS app. When you download an app from the App Store, you are downloading an encrypted IPA. When developers like Fouad Raheb create Watusi, they take the official WhatsApp IPA, decrypt it, inject their custom code (the “tweak”), and then re-package it into a modified IPA. ipa apps me watusi
You cannot simply download a Watusi IPA and tap it like an Android APK. iOS’s strict security model prevents this. To install a modified IPA, you must “sideload” it using a developer account or a third-party tool that resigns the app with your own certificate. Alt-signing services (no jailbreak)
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