Is Rocket.Chat aka Chat+ the best decision? It won't work with iOS Safari browsers, this means only Android Devices with (Firefox/Chrome/Opera) will work. Compared with actual Flash solution I gain nothing by replacing old chat with new Chat+.

Also as a matter of feedback the interface of Rocket Chat does not provide a clue of what can be done with some little tiny icons. No explanations given. It used to be some text that tells what the button does, but on Rocket Chat is all point,click and see more guess.