Photo Vault - hide pictures - hide photos - encrypt and hide photo locker app. Photo Vault - Simple to encrypt file - hide file - protect and secure your hidden file app. Photo Vault is an app developed for secure app that lets you protect any private folder on your Android smartphone quickly and easily. With Photo Vault, you can hide, encrypt and create a PIN or password to stand between your personal files and prying eyes. Photo Vault relies on secure safe folder to create a private, encrypt