? When your message is readable on the other side, on the app which we are supposing has a "problematic" privacy policy, it is unencrypted. Encryption is a matter in transmission. The data acted upon (e.g. displayed) on the other application has to be finally unencrypted, or decrypted.
Alice sends message "Hi" to Bob through app Alpha; it is encrypted during transmission; Bob receives it on his app named Beta - but Beta manages the message in fully readable form, "'H'-'i'", and does what its coders want with it.
