Troubleshooting Connection Issues for Castify app

Ensure the phone/tablet and casting device(TV) are on the same WiFi network:

Sometimes switching off and on the WiFi helps resets the connection. 5ghz WiFi is recommended over 2ghz:

Check the "Scan for Devices" option and select the devices you want the app to look for:

If you're using a VPN app, looking for setting called 'local network discovery' or something similar. Enable this setting will allow the WiFi system to see your devices on the local network. This setting is in your VPN app.

If the above does not help, try rebooting of both the phone/tablet and the casting device(Roku/Chromecast/Android TV, etc..)