India, Dec. 26 -- It can be a cause of stress when you give your phone to the other person just to make a call only to know that some conversations are more personal than others. WhatsApp chat lock is designed to give users extra privacy by securing individual conversations instead of locking the entire app. If you are wondering how to lock WhatsApp chats, the process takes only a few taps and does not require any third-party app. The Chat Lock feature of WhatsApp was actually created in that real-life situation and allows you to conceal particular conversations behind that additional security layer rather than locking the whole application. This feature significantly improves WhatsApp chat privacy, especially for users in shared househol...