WebRTC provides a peer-to-peer protocol for secure data as well as media streaming.
This app uses data-protocol named as SCTP protocol which runs top over DTLS which means that every bit is secured & encrypted.
RTCMultiConnection takes care about following things:
1) Multi-user connectivity is reliable
2) Rooms are secured & there is no chances of vulnerabilities or security holes
3) No single digit is stored on server to make each and everything private and secured. Everything is peer-to-peer.
It is TRUE that if Firewall is blocking WebRTC, then this app fallbacks to TURN server.
Fallback to TURN server means that your files data will be shared through TURN server.
However these are VERY RARE things.
Realtime statistics says that 99% of WebRTC apps uses STUN rather than TURN.
STUN means that every bit is peer-to-peer.
Peer-to-peer means that everything is shared directly between two systems. No server involvement at all.
To understand how server is used:
1) Server is used only to create/join rooms. (i.e. WebSockets server)
2) Server is used only if Firewall blocks ports (i.e. TURN server)
Question: Can anyone see my room without my permissions:
Answer: Nope, NEVER. Your room is 100% private/secured and no one will be having idea about your room until you share your room yourself.
Question: Is this app works only on Android?
Nope: This app works both on iOS and Android.
Additionally you can share files with desktop users as well. Desktop users MUST have to use either Chrome or Firefox or Opera.
You can even connect a native EXE/DMG desktop application from your Android app.
Means that you can share files with anyone on any well-known platform (Android, iOS, MacOSX, Windows, Linux)