This app has one purpose: To cover the sound of typing on your keyboard.
Research has shown
that typing sounds from mechanical keyboards can be analyzed to steal passwords with above 90% accuracy. Playing music is not enough, since it can be filtered out.
The sounds in this app are randomized and mimic common mechanical keyboard, so are impossible to filter. Just leave this app running near your keyboard whenever sounds of your typing could be recorded, such as during a Skype call or in internet cafes.
Learn other ways to fool key logging devices and stay safe online here