I using this app of facebook name facebook messenger it is very good app I use this app from 1 year but I don’t see any error or probelm in this app so I prefer others to use this app the greatest benefit of this app is when you close your facebook in browser if you received any message in your facebook account than this app gives you instant notifaction and I n this app of facebook you have many stickers which you can use while your chating so this is very good app.