You could give a look at simplex (https://simplex.chat/) ; it seems to be a possible alternative to signal, mostly focus on protecting user's privacy. Yet in my experience it doesn't allow (yet?) a call between multiple devices simultaneously.
An other alternative would be to use xmpp protocol using a jabber like server and apps. The advantage being that there is a lot of servers and even more apps, and that not every family members need to use the same... but if you are the one going to help them install, setup and upkeep, you may see mulyiplicity as a down side.
Hello,
You could give a look at simplex (https://simplex.chat/) ; it seems to be a possible alternative to signal, mostly focus on protecting user's privacy. Yet in my experience it doesn't allow (yet?) a call between multiple devices simultaneously.
An other alternative would be to use xmpp protocol using a jabber like server and apps. The advantage being that there is a lot of servers and even more apps, and that not every family members need to use the same... but if you are the one going to help them install, setup and upkeep, you may see mulyiplicity as a down side.