Map My Day.
The application uses geolocation, localstorage and html canvas to let you track and visualize how long you spend time at specific places. Using the app you can check-in anywhere in the world and the application keeps a track of your check-ins.
When you check-in the app automatically starts tracking your time at the location. The time at your
current position will be tracked until you hit "Check Out". By
default an entry of your current position with 10 seconds time will be
added after initialization.
Via: Street View Funny