WhatsApp from Facebook is a FREE messaging and video calling application. It is used by more than two billion people in more than 180 countries. It's simple, reliable, and private, so you can easily stay in touch with your friends and family. WhatsApp works on mobile and desktop devices even with slow connections, no subscription fees, all you need is your phone number, no usernames or logins. You can quickly see your contacts who are on WhatsApp and start sending messages.
Required Android Versions : KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]