when did you join twitter:
whendidyoujointwitter is a web service to find your twitter joining date.
1.Go to whendidyoujointwitter.com
2.Type your twitter username and click Find out! button.
how often do you tweet:
howoftendoyoutweet is a web service to find your average tweets per day.
when did you join facebook:
when did you join is facebook app to know the month and the year you joined Facebook.