What are chat bubbles?
On Android, bubbles allow you to set chat notifications as little circles that appear on your phone's screen. They're small enough to not distract from what you're up to, but always available if you need to respond to a quick message.
What apps have chat bubbles?
What is Flychat. Flychat is an app that brings the chat heads style bubbles for a lot of popular messaging apps like WhatsApp, Hangouts, Textra, Line, Skype, Facebook Messenger, Plus Messenger and even Slack.