Use WhatsApp Messenger to stay in touch with friends and family. WhatsApp is free and offers simple, secure, reliable messaging and calling, available on phones all over the world. Log in to WhatsApp Web for simple, reliable and private messaging on your desktop. Send and receive messages and files with ease, all for free. Go to the Microsoft App Store. Download the app and follow the prompts to complete the installation. Download WhatsApp on your Android device with simple, secure, reliable messaging and calling, available on phones all over the world.