Whatsapp is a messenger app used for sending message to friends or family members.It contains many features like sending photos, videos, files etc. We can also make calls from it. On Whatsapp we can set our profile picture and statues. All the peoples who has android phone they surely use Whatsapp. There are some limitations of Whatsaap like we can send 10 photos in one time, call quality of Whatsapp is not so high, we can use only one Whatsapp in single phone.But over all this is a best and most used application for sending message.