You may also compare KakaoTalk to WhatsApp if you install it on an iPhone or Android. The program supports many different functions that you would find on other programs like Viber or Skype, but can also send text messages to cell phones. KakaoTalk is a comprehensive chat and messaging application which not only supports conversations on mobile phones, but this version is specifically for the Windows PC. An asian-based instant messaging program with lots of features.
