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, with no subscription fees. Your personal messages and calls to friends and family are end-to-end encrypted. No one outside of your chats, not even WhatsApp, can read or listen to them.
Required Android Versions : Ice Cream Sandwich [4.0.3–4.0.4] - Jelly Bean [4.1–4.3.1] - 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]