If you don't have a BlackBerry device:
You can use this app on your Android device absolutely free for 30 days. After that to continue using the app subscribe to BlackBerry Hub+ from the app or from BlackBerry Hub+ Services.
If you have a BlackBerry device:
BlackBerry smartphones powered by Android get the app for free.
Privacy Shade prevents people around you from seeing your screen by blocking out everything except for a small view area that you control while still letting you interact with the full screen.
• Turn on Privacy Shade to control the visibility of sensitive content
• View and send sensitive content while in the open without letting others around you see your private information
• Use Privacy Shade to only expose the exact area you’re reading or typing in
• Adjust the transparency of the shade to suit your environment