When was the last time your doctor made a house call? For some, the answer is probably never. For whatever reason—from urbanization to insurance costs—it would seem that the days of a medical professional visiting a patient at home are well and gone.

But thanks to mobile devices and the Internet, health monitoring is no longer confined to a doctor's office. More people than ever are tracking their own health using apps and devices. The Pew Internet Project says that 70 percent of U.S. adults have tracked a health indicator for themselves or someone else, and 21 percent use technology to do so. Flurry has seen usage of health and fitness apps grow 87 percent faster than the app industry as a whole.

Physicians, however, are slower to adopt apps. A 2013 survey by AmericanEHR Partners found that only 28 percent of physicians who used smartphones in their practice and 18 percent who used tablets were satisfied with the available apps.

Patients and physicians may find some common ground on healthcare apps by using them to interact with each other. A few apps have adopted the 21st century approach to the house call; check them out in the slideshow.