@ayo XMPP is by far less bloated. And setting up a server is very easy. :)
Conversations for Android and.. ChatSecure and/or Monal for Ios? I don't use Ios myself, so I don't know how good they are.
@hund It's been ages since I last used XMPP. Guess I'm going to give that a try again. :)
Welcome to your niu world ! We are a cute and loving international community Ｏ(≧▽≦)Ｏ !