I m using WHATSAPP from two year.
This app bring the world much closer as it was before.
I m using this app in my day to day life, this app becomes on of the important part of my life.
The concept they used is great.
Though this app people can get in contact easily with some extra features.
The features are also awesome, they provide to give status in video format.
In whatsapp we can send messeges as much as we can. And the best thing they provide to make groups, in which we can easily send a single messge to many people.
We can send pictures, videos, pdf file and many more things.
Overall best app for me.