Ah I think there is a slight misconception. Screenshots of how Fully Browser looks can be found in the Google play link. However this app does not provide a Homey dashboard but a way to control your existing one. If you want a homey dashboard please look into Node-Red dashboard or HomeyDash to set one up.
This app only allows for controlling the fully browser on your dashboard device. So that you can load your already existing dashboard, turn screens on or off, load different sites or other Android applications. However you still have to setup a homey dashboard by yourself.
