I gave up Briar for SimpleX, as really good as Briar is, because of only having one ID. On SimpleX, if you enable incognito, it will create a new random ID for each new contact that you message, so no 2 persons will see the same ID for you, they each see you as a different name.
Also SimpleX is on iOS and Android, Briar is only for Android, and SimpleX does calling with contacts.