Currently only on the www site. It’s on the roadmap for the app. Perhaps 2018 on that one. www users can find it at https://www.utehub.com/chat or select chat in the Hub menu.
Yeah I didn’t code the chat application. There is a “way” to get the app to communicate with it, but it will take quite a bit of work, so I have to decide if I’m going to go that way or make my own chat system.