Whatsapp (Rs 55)
Even though there are quite a few cross platform chat applications available for users today, no one offers functionality like the good old Whatsapp messenger. The best part of this app is that you can use it for free for first year and after that if you think you what to have it you can buy it.
Whatsapp is a true cross platform messenger application that is available on Android, BlackBerry, iOS and Windows.
The messenger allows users to have text chats and share files amongst friends across platforms. And alongside instant messaging, Whatsapp also allows sharing of photos, videos, audio and location.
The most convenient part of the app is that it uses the phone number of the user as identity so that one need not go through a lengthy registration process. Whatsapp sends messages through the internet, hence SMS charges are not applicable but users have to pay for data consumption, which is not a problem if you have an unlimited data pack.
Also, the messaging app scans users' address books when they sign in for the first time, and tells them which of their friends is using Whatsapp by syncing its databases with theirs.
