Secret File Box is a private file manager that can perfectly protect your privacy and hide your private photo albums, private photos, videos, audios or other types of files. On the surface, this is a standard calculator with the functions of a normal calculator, but you can access your private files by entering a password on the calculator, which is safe and convenient. Even if your phone is stolen, others cannot open your files. There is no need to worry about privacy being leaked. Secret File Box classifies and stores your files by type, so that you can quickly find the files you want. Secret File Box also supports multiple unlocking methods. And the entire application is completely free.