As long as they(Google) don't study why WhatsApp is the most popular messaging app, I don't think they will ever dominate this market. Here are the most important 2 things in my opinion that made whatsapp #1 messaging app.

- WhatsApp tried to reach everyone from the beginning. Founders knew that not everyone in world has enough money to buy a shiny phone every year.

- WhatsApp uses minimal bytes possible to send your messages to other side. This will be the only choice for people who have expensive data plans all over the world, and those who are travelling often and roaming enabled.

I am not even sure if my 4 years old android phone will be able to install the app. So will this app have a great success? I don't think so.