A free program for Android, by Kevandro Apps.

What is CalcVault?

CalcVault – Hide Private Photos And Videos is a great picture and video locker that lets you safely hide your photos and videos from strangers and snoopers. With the built-in PIN code and fingerprint authentication, no one will be able to access your files except you.

How does it work?

You can simply use the built-in PIN code to protect your files. Or, you can use the fingerprint scanner to log in. No one will know that you have a secret photo or video vault hidden inside your phone.

This is a free app that does not require any personal information. The only thing you need to know is your username and password.