That’s a very bold statement from an app that still requires a phone number using a broken protocol (gsm) to “verify” your identity and authenticate it, sim swap attacks can be carried out by kids these days. Also, don’t expect privacy when you are using a proprietary OS like iOS or one full of Google services that also have proprietary firmware drivers, they (the adversaries) don’t need to even decrypt these “privacy apps” when it’s easier to access the backdoor-ed OS or hardware, but enjoy the illusion in the meantime.
Not to mention that half of your comment is non-issues.