Whatsapp is a great and good chatting app for all platforms of mobiles whether it is ios , windows , and android. Its a great app for chatting and new updates are really good.
Concept ~ concept is really very good its new update has a good and easy concept.
Layout and designs ~ Layouts and designs are really very nice I like its layout and concept.
Features and function ~ Features are good its newly launched feature of status is really a good place to post photos of your memories.
Usefullness ~ It is very usefull app for who have too many talks and who want to talk without talktime.
Its a good and great app whatsapp