LINE is a mobile messenger app used in over 230 countries around the world with one billion users. It offers free one-to-one and group messaging, as well as a diverse array of lively stickers that can be used to express feelings difficult to convey with just words. Free domestic and international voice and video calls are also available. In addition to its messenger app, LINE has over 60 family apps which offer a wide range of non-messaging services ranging from games to photo sharing apps.