I've never heard of Threema and Zom before, so I checked them. Zom is... well, just another messenger. Threema on the other hand looks very interesting, but it'

I've never heard of Threema and Zom before, so I checked them. Zom is... well, just another messenger. Threema on the other hand looks very interesting, but it's a paid app - I don't know if any app will be able to pull what WhatsApp had with it's $1 pricing. Other, than this, Threema looks promising.