Today I am saying about WhatsappI really like his design &logo.I now & everyone now Whatsapp is most popular app.they are connected to every person.& at this time everyone to use this app.because they can invite your friends, family etc they can easily chat one person to another & you can do video calling easily if you are added your group. and I also used this Whatsapp I really like it.you can easily share picture, funny video & note of school, college . this app is easy to useful.if your friend in any place you can chat & video calling easily.