Hi My self vasudev
So. WhatsApp is an app which doesn't give a chance to complaint or point out
It's an extraordinary app which allows you to chat with friends that too very fast and effuciently.
It's a free app
And I recommend you to enjoy it's use.
And coming towards the comparison. It's very handy and good app. I really appreciate it.
Don't wait any more now. Just go and use it.