Looks great, now just have to find a counterpart to test it out with. I love the fact that it's native, props for that. I had no idea that people are putting Electron/browser apps out there, yuck.

How does signaling between clients work? Is this going to a server you control?

And what about encryption, is that enforced by WebRTC per se?

Lastly, are you routing calls through TURN servers if NAT tunneling with STUN/ICE fails, or always?

I just wish that SIP had taken off. Then we could just call each others email address. Kinda works with FaceTime, except it's Apple's garden.