Carbon.to have been up now for nine months. It has been visited more than 5ooo times from 74 different countries. I consider that a success, the application have been received positively. People usually understand it directly and start playing with it right away.

A problem we discovered is that as the app is built using Ajax we didn’t have any information of how users were interacting with it, what were they comparing? I programmed a simple javascript logging system, and these are the results after a couple of weeks:

See bigger.

Some conclusions:

1. Most users are pretty active in the site and do not leave at first. The average interaction (changing units, clicking + or -) is close to 50.

2. Transportation units (as car km) are the most compared, together with electricity ones, and beer (I would have guessed that one . Food units on the other hand are not that popular.

This are just preliminary data, but with 12000+ interactions it’s already quite representative. More analysis will follow, for instance what is things people compare most against? and more interesting questions that arise. This is however a good step from not having any idea of what people were doing in the site and a good base for improving it.