GYM THIS WEEK
One-page app that counts the number of times you've worked out in a week, based on your Foursquare history.
By default, the app counts visits to “Gym / Fitness Center” locations. You can customize the app to also accept all checkins mentioning #run, #kickball, #bhangra – or any other hashtag you wish to track.
Try it out yourself: gymthisweek.com