The use of mobile communication technologies to improve the health of individuals and populations — dubbed “mobile health,” or “mHealth” — has grown dramatically since 2008, when the term mHealth became widely used. The excitement over the use of mHealth technology especially in low- and middle-income countries (LMICs) stems from the recognition that mobile phones have penetrated the market like no other technology. There are more than 5 billion wireless communication subscribers, and more than 70% of them are in LMICs1 (though the subscription rate in low-income countries is 60% overall, and much lower in rural areas). Moreover, commercial wireless signals reach 85% or more of the world’s population, extending much farther than the electrical grid.article ….more