This Innovative Screen Saver Application can help protect user privacy when the user is using his/her smart phone in a public area, especially crowded area such as public bus, train or meeting room where a lot of people around him/her may be able to see what he/she is doing (watching, reading or writing contents) with the phone. This application will display only an active area that the user is interacting with whereas the rest will be shown as black pixels. The user can move or resize the active area as desired. This enables user to do secret works in anywhere and anytime as people around the user cannot see the entire screen or cannot guess what he/she is doing. Also, displaying black pixels is expected to save phone battery life.