First, the good news: a growing class of mobile health apps are helping people do everything from lose weight to manage diabetes to chat and talk with doctors in real time. Investment in the sector is expected to increase by 25 percent for the next five years and, according to Chilmark Research, it could exceed $1.1 billion by 2017. But healthcare innovation experts say the vast majority of mobile apps fail to engage consumers and the category as a whole has yet to win over doctors. Read the full story at Giga OM.