This guest post is part of the Festschrift of the Blogosphere celebrating HealthBlawg's Tenth Blogiversary. Festschrift posts are appearing throughout the month of June 2016. A recent article in The Commonwealth Fund blog, "Envisioning a Digital Health Advisor," raises the question of being able to use smartphone apps to get real-time, accurate and personalized guidance for health concerns. While one can envision the convenience, affordability and peace of mind that would result from their use, such services face a number of hurdles before they become reality. As a result, the "digital revolution" has not yet greatly affected most people's interactions with the health care system.