DU Privacy Vault - App Lock - don't like when someone climbs on your personal data? This feeling is familiar to many of us, when you gave someone your phone, and the man starts to quietly climb to where not worth it. This application was created in order to protect you from such curious and inquisitive. You can install several types of passwords on your device, or to deliver the password separately for a certain application. For example on your page in the social. networks. That no one would have judged and not read your messages.