Whats app you can easyily sent messages to any part of the world with out any charges. this service is completely free. all tools provided by whats ap are very easy to use .if do not have any advertisements on display screen. this app automatically imports the contact from your phone and tells you that how many of your friends are using whatsap .you cam share your location, photos, status, with your frinds and familys members .you need to spend any money for chatting and sharing with your frinds .it also allows you to send 100 messages a month to any of your friends not yousing whats ap for free. layout and dising is awsome.i think whats is the main part of our life.i love whatsapp