A free app for Android, by Bamboo Interactive.

If you want to have your photos, videos, and files protected from others, Smart Calc Guard is the best solution for you. The app looks like a real calculator, and it also performs calculations. Thus, no one will know that you are using an app locker.

Smart Calc Guard is a secret vault that can be used to hide photos, videos, and files. With the help of this app, you can easily hide photos, videos, and files. You can even hide a folder.

To protect your files, Smart Calc Guard has a four-digit password that you will have to use to open the vault.