KakaoTalk

KakaoTalk (Korean: 카카오톡) is a free mobile Instant messaging application for smartphones with free text and free call features. It was launched on March 18, 2010 and is currently available on iOS, Android, Bada OS, BlackBerry, Windows Phone, Nokia Asha and Personal Computer. KakaoTalk currently has 170 million users and is available in 15 languages. The app is also used by 93% of smartphone owners in South Korea.