There is nothing to install. You open a web address, pair the screen, and then settle the device settings that let it run on its own.
Guides
Open Screenly Anywhere in a browser, pair the screen, and configure the device so it keeps playing unattended.
In this section
Open it and pair the screen
Open Screenly Anywhere in the browser on the device you want to use as a screen, and pair it with your workspace.
Run it unattended
Put the browser in full screen or kiosk mode, start it automatically, and stop the device sleeping, so a browser-based screen runs without anyone in the room.