TwentyFeet – Google Analytics for your Twitter Account
TwentyFeet basically does what It says. It gives you a slick number of graphs documenting growth and impact of your Twitter account. This can somehow be seen to be quite similar to Google Analytics for a website. It is very useful if you really try to monitor your Twitter Account.
TwentyFeet provides you with a One Tweet summary every week that gives you all the details in less than 140 characters. If you are very busy, this is super helpful.
https://www.twentyfeet.com/