runnr is a free Chrome add-on developed by David López that allows you to measure the distance you scroll on Tumblr. It is a unique concept that brings together the world of running and the virtual realm of Tumblr.

When you go out for a run, you experience the feeling of moving faster while everything around you seems to move slower. runnr captures this essence by measuring the distance you scroll on Tumblr. It takes into account the trees, shop windows, people walking their dogs, and even the concept of time slowing down.

With runnr, you can now quantify the distance you "run" while scrolling through Tumblr. Whether you are listening to music, lost in your thoughts, or simply enjoying the content, runnr keeps track of the kilometers you cover.

This Chrome add-on by David López is a fun way to bring the world of running into the digital realm. It offers a unique perspective on how we interact with online platforms and provides a new way to measure our engagement. So, if you've ever wondered how many Tumblr scroll kilometers you cover each day, runnr is the perfect tool for you.