Could modded versions of Kik messenger pose a security threat to other Kik users?

I was on the Kik messenger app, and someone in a group chat posted screenshots of his modded Kik app that contains an "IP grabber". He said he could hack people easily, and was very fast to tell me my own IP address. He was able to tell when anyone in the chatroom was lurking (i.e watching the chat without typing), for how long, their last activity, etc. I have no idea how, but he was able to know my IP address along with 2 other people in the chatroom. Prior to this, he had sent me a picture which I downloaded a week ago. He has not sent me any links, and I have certainly not clicked on any links from him. We had a few messages back and forth, but that's it. He said that he would hack me, so I logged out a few hours later. I used AVG antivirus and Kaspersky to scan my phone, and there were no issues detected. I manually checked my downloaded apps on Android, and there wasn't any downloaded app that was new. I have since then logged out of Kik, but I am concerned: could he be spying on my phone, and what can I do to prevent this?
http://dlvr.it/Rz2V3S