As the self-quantification movement matures, users are expanding beyond physical tracking to assess how they think, decide, ...

People who identify with the “Quantified Self movement” are, as expressed in the movement’s motto, seeking “self-knowledge through self-tracking.” They want to know how to sleep better, stay fit, or ...

When you were growing up, the closest you ever got to a personal medical data-collection device was probably a thermometer, or a bathroom scale. But these days, health trackers are a lot more ...

When I meet a friend for coffee, she first takes out her phone, as she explains, to check that her fitness app has calculated her steps from her car to our café. Another friend joins us just in time ...