A free program for Android, by Filmera Inc.

If you want a secure place to store your personal photos, videos, and files, then you’ve come to the right place. The Calculator Lock is an app that helps you to create a secure place on your device to store and protect your personal files.

Calculator Lock is a free and easy-to-use app that allows you to hide photos and videos with a simple and clean user interface. You can choose to hide a photo or video and then create a secret image or video that only you can view.

In addition, you can also protect your files with a password and with the fingerprint scanner.