WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS.WhatsApp Messenger is available for Android,iPhone,BlackBerry,Windows Phone & Many others, those phones can all message each other Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends.We can install watsapp on your PC or MAC by using BlueStacks which is an Android Emulator.BlueStacks App Player helps you install WhatsApp and thousands other application because its an Android operating system running ontop of your Windows PC or MAC Operating system. So Inorder to Install WhatsApp Messenger on your PC. Download Bluestacks Application.