Another life changing app, it took whole instant messaging thing to whole different level and changed the social media apps.It is one the revolutionary product of the internet.
The basic concept of whatsapp is just like a normal messenging app but only difference is that we can send files, videos, pics, songs and many more and it is free, which is more than enough to say.It si specially encryted to protect your personal life so the process of hacking is not possible.Nowadays whatsapp was lacking feature, instead of bringing out new features it blantantly copied SNAPCHAT I think they can do more than that.