App icon

[Neurogeek]

There is an icon appearing on my daughter's Galaxy 5 notification toolbar and we are not sure which app it belongs to and/or why it is there. The icon in question is a round, white speech bubble with three lines in the middle. Is anyone familiar with this icon?

 

[Unforgiven]

Swipee down the notification bar, long press on that notification and you can tell which app as producing it. I can seem to find it in the stock S5 notifications, so I must be an app she installed. Possibly a texting or chat app as a guess based on the icon.