Data analytics

America's data treasure trove

illustration of a video camera
Illustration: Sarah Grillo/Axios

An exposé for New York Times Opinion out in December called "One Nation, Tracked," by Stuart A. Thompson and Charlie Warzel, walks readers through how they mined a data file of 50 billion location pings from the cellphones of 12 million Americans as they moved through several major cities, including D.C., New York, San Francisco and L.A.

Why it matters: Supposedly anonymous data isn't always all that anonymous.

Apple "research" app brings health data to the upscale masses

Iphone screenshot of the research app
There are three longitudinal studies on the Apple Research app. Photo: Apple

Apple released on Thursday an app for iPhone and Apple Watch users to participate in three longitudinal health data studies.

The big picture: Apple is just one of several Silicon Valley companies investing in health tech and transforming the future use of health data. Clinical trials via phone could increase participation rates, compared to traditional in-person studies.