Private Photo, Video Locker Is at first glance quite ordinary application for secure file storage. It can be used to hide files from prying eyes, and only with a password can access the data. But it has one feature, it is not simply hiding the files you need, and completely disguises them under the calculator. Even when you run the application it will look like an ordinary calculator, and only after you type the correct code and press = it gives you access to the application or file.