I just got set up on Simple X Chat. From my cursory research it seems to have the best security going in a chat app right now. I find the UI really slick too. It has all the features I use in a chat app anyway. The only thing to be aware of is that all the messages are saved locally, so backup/recovery needs to be handled by you. There’s a couple videos an YouTube that go over the app.

All that being said, I still have WhatsApp on my phone. There’s still the same problem of getting everyone in your life to download another app.

Couldn’t have said it any better.