Signal is a messaging app with privacy at its core. It is free and easy to use, with strong end-to-end encryption that keeps your communication completely private. • Send texts, voice messages, photos, videos, GIFs, and files for free. Signal uses your phone’s data connection, so you avoid SMS and MMS fees.
This is an example of that. Talk about timing, LOL
Signal ain't all that. Evidently the NSA can read messages in the app. They did it to Tucker Carlson's account.
https://twitter.com/Sprinter99800/status/1696273335888326739
What it all boils down to is you can't trust any app on any app store. You'd have to compile the code yourself (and ensure you have unaltered code through comparing checksums, etc.) and that could be still be dodgy because who has the time to determine what the compiler is doing? There could be special cases buried deep inside that. Security is hard.