What is the name of Tumblr's official blog that tracks trending fandoms?

Tumblr’s official blog that tracks trending fandoms is called Fandometrics.

Fandometrics presents rankings based on activity surrounding entertainment properties and fan communities on Tumblr. Its lists have covered categories such as television, movies, music, video games, celebrities, and web personalities, giving readers a snapshot of what Tumblr users were discussing most intensely.

The project’s name combines “fandom” with “metrics,” reflecting its data-driven approach. Tumblr described the rankings as drawing on activity such as searches, tags, reblogs, and likes. That means a Fandometrics ranking measures platform attention and volume, not necessarily critical quality, universal popularity, or positive sentiment.

Readers sometimes confuse Fandometrics with Tumblr’s general trending or Explore features. Those tools surface current posts and topics, while Fandometrics focuses specifically on fandom culture and recurring rankings. The blog became especially notable because Tumblr’s communities often organize around highly specific fictional universes, pairings, performers, and genres that broader social-media charts may overlook.