The quantified-self movement reached meetups in seventy cities by this era

Evidence

This data can be aggregated and analyzed using customizable online tools like Daytum, which can track anything from “rides to work” to “types of coffee consumed.” The Quantified Self blog collects information about this movement and holds meetups in seventy cities in twenty-six countries. — Alice E. Marwick, Status Update, 543

Categorization

• XREF: The quantified-self movement connects to Gary Wolf’s Wired pieces and later quantified-self discourse in lifehacker communities.