Do health apps really have the capacity to help the healthy?

PROS AND CONS: Health apps are all the rage, but what are their benefits? A report in the British Medical Journal offers two views.

Health apps and connected health devices are all the rage at the moment. Do they, however, present any benefits to users who aren't sick? Two doctors each presented their points of view in a recently published report. 

Diabetes, asthma, high blood pressure, weight loss... there seem to be almost as many smartphone health apps today as there are diseases. The mobile health market is booming, but are these applications all useful, especially for people who aren't sick?