Whatsapp is one of the best app because it give all the features to me and it wiil so helpful I tried this app many of time ago its video calling is to good it help me to talk my friend sent my photos and much more in this app its concept is to good it make me good layout and design is very good its features is to easy to use every person use whatsapp because it is so simple just put no. And sent massage to your every whatsapp friend I am tell about his usefulness it is very useful app for every one so this app is most important app I love WhatsApp