The era of "Quantified Self" (a term coined in 2007 by US WIRED founding executive editor Kevin Kelly) is relatively new. The first Fitbit digital step counters launched in late 2009, and we've since seen an explosion of various wearables, apps and digital health devices all riding the exponential wave of smaller and cheaper mobile-connected and app-ified sensors and computing. We are now at the point where it is possible to measure almost every component of human physiology and many elements of behavior. But just having data (in increasingly overwhelming amounts) from disparate devices and apps does not alone translate to better health and prevention or improved management of disease. The data and analytics need to connect with clinical endeavors to be translated into knowledge and actionable information.