This app was removed from the App Store.
Mac OS Productivity
Re:Desktop allows you to hide all windows or show in one click.
Use the dock icon or menu bar icon or shortcut Shift + Cmd + Space
It's very easy click on the icon to hide all windows, and then click again to show all windows.
You can also setup showing menu bar icon , dock icon and setup to launch application at login and customize shortcut.
In dock less mode hides all windows, except current active window.
In update changed menu bar icon.
Press Shift + Cmd + Space.