Whats app is very helpfull app because we can chat our frnds and whats app make us happy we can share pic video doucument and emoji is too good of whtsapp we can group chat and now a days we can voice calling on whats app its very helpfull for us I am very thankfull of whats because I love to chatting we can share jokes emotions we can upload display profile and upload status we can inform any person we can share and every one loves whats app I am speechless because no app like whats app we can send greeting birthday wishes every thing .thankyou whats app. : -)