BlackBerry Privacy Shade is described as 'Local privacy app to black out portions of your screen so no one sees what you're doing' and is a Privacy Tool in the security & privacy category. There are 2 alternatives to BlackBerry Privacy Shade for Windows, Android and Android Tablet. The best BlackBerry Privacy Shade alternative is ScreenGuard, which is free.
ScreenGuard helps you keep your screen contents private by applying a screen filter that makes it tough to read. Select from a variety of filters to find the setting you're comfortable with.
Privacy Hide is a utility that allows the user to quickly hide specific applications from the computer screen with a single keystroke.
Wrong platform and hides a totally different thing
Greece
EU
From what i gather screen guard just sets screen filters with different colors/patterns.