
Hedonometer
Measuring the average happiness on Twitter
Hedonometer launched on November 28, 2017 with 83 votes, #583 of 3,137 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 8 years on.
What it does
Hedonometer.org is an instrument that measures the happiness of large populations in real time. The hedonometer is based on people’s online expressions, capitalizing on data-rich social media, and measures how people present themselves to the outside world.
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