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 ...

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

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 ...