There’s a good chance you have at least a few files on your mobile device that are private and you’d like to keep from others seeing. But, some of you may be wondering how do you ensure that people won't see these private files? This list of apps provide users with a way to use a digital vault to their advantage and lock away whatever they want. You’ll find a list of security measures, intruder monitoring tools, and so much more to give you peace of mind.