kobiwaldi Wrote: the the most problem at all. You will use what all of your friends are using. In Germany all is about personal data secureness but most people use whatsapp. why ? because whatsapp was first and all using it :D its hard to confince them to another app.
But to answer your question: They are mostly the same.
Same in my country and viber, everyone is using it so anyone looking for an app will choose it.