Is Blue WhatsApp Safe to use and legal?

BlueWhatsapp is a third-party application that provides exceptional features of the messaging app. It is unavailable on Playstore. It comes up with a pure 100% Blue interface. It offers many customisation options. Unlike Official WhatsApp, it has many advanced features. 

Here comes one of the main concerns of the users, “Is BlueWhatsapp safe to use and legal?”In this article, we will know whether it is safe to use or not.