Hi Everyone! I'm building an app for my boss, and I have to implement a chat. the app will run on iOS for now but in the future it's gonna run on android too, so I need a cross platform solution. I will develop it in Swift, on Iphone only. once you logged in by Facebook , Twitter or email you'll be able to send messages to other users logged in the app and online. you know, waze style. I think i cannot use iMessage. Someone told me about jabber. Boss told me to look for a third party chat service but I cannot find the right one. could someone help me?