### What about the connection? It's a P2P-connection directly from device to device or is there any third-party-server?
It uses a P2P connection when WebRTC is supported by the browser. (WebRTC needs a Signaling Server, but it is only used to establish a connection and is not involved in the file transfer).
If WebRTC isn’t supported (Safari, IE) it uses a Web Sockets fallback for the file transfer. The server connects the clients with a stream.
### What about privacy? Will send files be saved on third-party-servers?
None of your files are ever saved on any server. If you are curious have a look [at the Server](https://github.com/capira12/snapdrop/blob/master/server/ws-server.js)
I wanted to play around with Progressive Web Apps and then I got the idea to clone Apple’s Airdrop. By doing research on this idea I found and analysed ShareDrop.
ShareDrop uses WebRTC only and isn't compatible with Safari Browsers. Snapdrop uses a Websocket fallback and some hacks to make Snapdrop work due to the download restrictions on iDevices.
