File And Folder Locker is the best tool for locking down your device. It provides the best security for your Android and prevents intruders from getting access to your personal files.

The tool is capable of locking down all types of files and folders, including photos, videos, audio recordings, contacts, notes, and even PDF documents.

You can use it to make your Android device more secure and keep intruders away from your personal files and information.

The app has a powerful preferences portal that lets you customize the app usage, i.e. app lock suspension, intruders selfie on or off, change security questions, Strong PIN / Pattern Lock options, etc.