A free program for Android, by Bus Simulation.

Calculator Lock is an app that can secretly hide photos and videos. This app can be installed on your Android phone and will create a secret folder that you can access with a PIN number.

This is a secure and safe way to hide your files and keep them safe from prying eyes.

You will have a secret folder that will be hidden from the system and even from other apps.

This is a great way to protect your privacy and your files.

The main advantage of this app is that it is easy to use and it will help you to hide photos and videos in a very easy way.

The app is designed to work on Android phones and it is compatible with most Android devices.