A proprietary application for instant communications on electronic devices such as smart phones,tablet computes and personal computer. Line users had many things we can do. Exchange texts,images,video and audio,and conduct free voIP conversations and video conferences live, designed in korea and launched in japan in 2011 ,reached 100 million users within eighteen months and200 million users only six months later. Line become japan's largest social network in 2013 in october 2014,line announced that it had attracted 560 million ures wordwide with 170 million active user accounts. In february 2015, it announced the600 m mark had been passed and700 m were expected by the end of the year.