I'm also from Brazil and share the same fears. I built a family note taking app which has an internal contact form for the same purpose. One can use it to conta

I'm also from Brazil and share the same fears. I built a family note taking app which has an internal contact form for the same purpose. One can use it to contact family members in situations of having the phone lost/robbed. Now I'm looking forward to implementing an ephemeral web conference room via API so we could have emergency voice chat. I tried with Jitsi, but it didn't work for me.