That's why I said an app like signal. People assume that every app works the same. Telegram had issues with encryption where all parties didn't have encryption enabled but one or more of the parties involved assumed the chat was still encrypted.

However I should probably change that to read more along the lines of: know the features and settings of your app and ensure that encryption settings are set to maximize the protection of privacy.

I'm gonna have to workshop that. It's a mouthful.

Either way, thank you for pointing that out.