It's called 750words. 750Words.com is a free website was originally created to help people keep track of their daily writing. The owner of 750words, Buster Benson, also created another website called HealthMonth, which provides a similar function to 750words.com, except it helps people track their healthy activities.
The concept behind 750words and HealthMonth is called “The Quantified Self.” This means measuring pieces of your personal life so that you can feel motivated to continue with a course of action, whether exercise, writing, eating better, or some other edifying pursuit. How can you measure running every day, or what you eat? You report back to these websites.