Calculator Lock -AppLock Vault is a free Android app developed by Crazy App Technologies. It is a privacy protection app that allows users to lock their apps using a calculator, pattern, fingerprint, or password lock. With just one click, users can secure their phone and prevent unauthorized access to their apps.

The app offers several highlights, including the ability to lock social apps like Facebook, Whatsapp, Messenger, Instagram, and more, ensuring that private chats remain private. Users can also lock system apps like Gallery, SMS, Contacts, Gmail, and Settings, providing an extra layer of security for sensitive information.

One of the unique features of Calculator Lock -AppLock Vault is its photo vault, which allows users to hide their photos and videos without worrying about others seeing them. The app disguises itself as a regular calculator, and only those who enter a numeric PIN can access the hidden files.

In addition to app locking and photo vault features, Calculator Lock -AppLock Vault also offers other functionalities such as preventing unauthorized app purchases or uninstallations, locking phone settings to avoid misuse, and providing options for pattern lock, PIN lock, and fingerprint lock.

Overall, Calculator Lock -AppLock Vault is an easy-to-use and user-friendly app that provides essential privacy protection for Android users. It offers multiple lock options, a photo vault, and additional features to ensure the security of personal data and information.

Please note that the information provided in the app description is for general informational purposes only, and any reliance on such information is strictly at the user's own risk.