What app you americans use for personal conversations?
Here in South Europe people mostly use Viber.
Edit: I was very unaware about situation in Southern Europe as I've learned from this post...
Most people in Croatia use Viber!
I keep wanting to like Signal but the fact that they refuse to allow multi-device use kills it for me. I can go for days at a time never checking my phone, every app I use also delivers messages to my tablet.
The nature of Signal being end-to-end encrypted by default without any third party in the middle does add some limitations for the desktop app. I do wish I could insert a fucking GIF though.