As well as a self-hosted web-based version, Dashboards are also packaged as a native desktop app for Windows, Linux and Mac PCs.
The desktop version has identical functionality to the web-based version, however the UI/windowing behavior is slightly different; both support the notion of multiple 'Screens' but in the desktop version each Screen is one application window. I.e. on desktop, multiple Screens is primarily useful in multi-monitor configurations where the app is typically configured to show one Screen on each monitor.