Calculator Lock App is a free mobile application developed by The Shiva that aims to protect your confidential files by hiding them behind a calculator interface. With this app, you can hide various file types such as videos, documents, images, and audios, among others.

The app is password protected, ensuring that only you can access your hidden files. The user interface is designed to resemble a calculator, making it difficult for anyone else to guess that it is actually a file vault app. You can also customize the main screen background to your liking. Additionally, the app offers a password reset feature in case you forget your password.

Overall, Calculator Lock App is a useful tool for anyone looking to keep their files secure and confidential.