Dr Robyn Whittaker discusses using mobile phones to deliver population health programs through text messaging and mobile apps. Examples given include programs to help people quit smoking through personalized text messages with tips, videos, and social support over time. Evaluation found the STOMP smoking cessation program doubled short-term quit rates compared to a control group and was equally effective across demographic groups. While the STUB IT program did not recruit enough participants to show a significant difference, it provided long-term support through 12 months. Mobile programs allow wide reach, integration into daily life, and less inequality than other technologies.