Facebook app, this social network app is used mostly world wide, for connecting people like childhood friends to now, mostly addicted app is facebook, this app is used for watching videos, playing games, chatting with friends, add more, this app is more useful now a days, when I am alone I used to open my account and seeing newsfeed, I will open my account 100 times per day more than that but not less than, this app is full to time paas, using video call, voice calls are very clarity, sending birthday wishes to friends, and some people say that Facebook is not an security but this ap is soo good its an trusted app, I am fully satisfied this app.