How To Fix “App cannot be installed because its integrity could not be verified” on iOS - iDevice Central
Apple has changed a lot in terms of how applications are installed and verified on iOS devices over the years. It all started with the advent of third-party AppStores back in 2016-2019. AppStores like AppValley, Ignition, TutuApp, and many more used to use enterprise Apple Developer certificates to deploy third-party apps, modded games, tweaked apps,
