title: How does Kakao Talk work?
body: <p>I have been doing some research to create an <strong>IM application</strong>. I saw many sample codes and still trying to decide which method to use. Before starting development I want to ask your opinion if anybody knows how popular IM applications such as <strong>Kakao Talk, Line, We Chat, WhatsApp</strong> work.</p>
  
  <p>I saw some articles saying to use <strong>Google Cloud</strong>, and some articles about using <strong>XMPP.</strong></p>
  
  <p>I am a kinda new for Android development and before starting development I want to see all my possibilities and choose best method for that.</p>
  
  <p>Thanks for your time. </p>