Calculator Lock is a free Android app developed by droltester. It falls under the category of Utilities & Tools and is a vault app that allows you to hide your private files, photos, videos, notes, contacts, and credentials. The app has a unique feature as it looks just like a beautiful calculator, and no one can guess that it is a vault app.

One of the main features of Calculator Lock is that it can hide your photos and videos secretly. You can protect your secret videos from prying eyes and prying friends. The private photo vault is hidden from the list of recently used apps, providing protection for your private videos. You can easily hide your photos in the vault from your gallery, and enjoy a private photo gallery that only you can view.

Moreover, you don't have to worry about your personal media files in the video storage, as the app ensures that your personal information is protected by hiding photos, videos, and important files in our private area. You can only view the files by entering a numeric PIN on the calculator panel of this app.

In conclusion, Calculator Lock is a useful app for those who want to keep their personal files safe and secure. It is easy to use and provides excellent protection for your files.