Calendar Lock - Photo Vault is a useful and easy-to-use app that can help you protect your personal photos and videos from unauthorized access by other people. With this app, you can hide your photos and videos from the gallery, and only you will be able to access them through a secret passcode.

To use this app, you need to install it first. When you open it, you will see a calendar. You can now access the vault by tapping and holding on to the calendar. You will then be asked to set a new secret passcode.