How to secure .ipa?-Collection of common programming errors

For users to install the IPA, it cannot be encrypted or protected in any way. App Store apps are protected with Apple’s FairPlay DRM mechanism, but there is no way to apply this yourself, and it is possible to remove this protection.

If you are trying to protect the assets (images, videos) in your app, this isn’t feasible. You just have to trust the people who have access to the app. You can try to obfuscate data or decrypt it at runtime, but if the user is going to see it on the screen, they can always find a way to get it out.