Ugly Duckling is a free Chrome extension developed by Norbert Jurga. It falls under the category of Browsers and is a subcategory of Add-ons & Tools. This extension aims to address the inconveniences and aesthetics of Twitter's free analytics.

One of the main issues with Twitter's free analytics is the inconvenience of scrolling to compare data from the last few months. Ugly Duckling offers a solution to this problem by providing a user-friendly interface that allows users to easily compare data without the need for excessive scrolling.

In addition to the convenience factor, Ugly Duckling also focuses on improving the aesthetics of Twitter analytics. The extension aims to make the analytics visually appealing, addressing the issue of the default analytics being considered "ugly" by many users.

Overall, Ugly Duckling is a useful Chrome extension that enhances the user experience of Twitter analytics. It provides a more convenient way to compare data and improves the visual appeal of the analytics. Best of all, it is available for free, making it accessible to a wide range of users.