http://isdb4l77sjqoy2qq7ipum6x3at6hyn3jmxfx4zdhc72ufbmuq4ilwkqd.onion/docs/guide/app-settings.html
The most typical use for this is to run Orbot app that provides a SOCKS proxy to connect via Tor network, but it can be some other app and it can proxy connections via some other overlay network. Use .onion hosts Android Use .onion hosts option is only available when Use SOCKS proxy is enabled. You can choose: no : never use .onion hosts.