Thank you for your response. The app doesn't let me type an ip address or a dns name so the connection is never truly direct, it's brokered by your servers. There does not seem to be a technical reason why before connecting directly both parties must go through your server first. If both computers are on the same network, why the need for an additional nine digit id? What i'm trying to say is that an app which allows truly direct connections without an intermediary looks much better from a privacy perspective because i don't have to trust the backend utterly and completely.