Health promotion web or app platforms can push out scheduled text messages or have participants pullmessages with their texts. That format fits well for teens, as texting is their preferred form of communication. Older adolescents spend an average of 90 minutes texting each day [19]. Teen programs to promote physical activity, alter diets, and enhance disease management have been designed that incorporate text messaging [51], and adding that component can augment the interventions’ efficacy [52]. A push/pull system offers some variability as participants can set their push schedule and determine what messages are pulled, and more individualized interactions can be driven by algorithms [53].