Although CM interventions clearly are effective at promoting smoking reductions, there are several challenges associated with translating CM into an effective clinical treatment for smoking. Perhaps the most significant challenge is the frequent monitoring necessary to objectively verify smoking abstinence using breath carbon monoxide (CO), the most convenient objective measure of smoking status. Because of the short half-life of CO (5-6 hours), CO levels must be measured at least twice per day in order to verify continuous abstinence. Recent CM-smoking studies have addressed this feasibility challenge by providing study participants with breath CO monitors and laptop computers or smartphones to use in their own natural environments (e.g., Dallery, Raiff & Grabinski, 2013). Participants are taught how to use their smartphones to text videos of themselves providing a breath CO level to a research staff member, twice per day. After the study staff has determined that the breath CO sample meets the abstinence criterion, participants are informed of the amount that they have earned for that sample.