Final on Nostr: It's a hardened Signal fork with passphrase encryption for the message database, ...

It's a hardened Signal fork with passphrase encryption for the message database, better notifications on devices without Google Play and support for pairing your messages to multiple devices. If you use Signal I strongly recommend it.

It's available in Accrescent so there is a root of trust between GrapheneOS -> Accrescent -> Molly.