Finding available computers
You may be able to see a list of available computers currently connected to the same Wi-Fi-enabled local network as your device. To do this, open the Bonjour discovery service at the bottom of the Connections screen:
Any computers in this list automatically advertize their presence to VNC Viewer. Providing a computer is set up correctly, and also the network if necessary, simply tap to connect.
Note: You may be required to enter a user name and/or password.