You’re welcome.
I use it with a friend that’s really concerned about security and privacy. The only downside I’ve faced is that adding contacts its kinda bodersome if you’re not fisically together.
It’s supossedly used by the French government, so I guess it says something about its security and privacy.
They use a custom encryption protocol and there’s been bugs that look like a backdoor.
https://grapheneos.social/@GrapheneOS/113020871978942265