Ecological Momentary Assessment of Smoking Triggers, Needs, and Cigarette Forgoing (spark Forgo)

This study will evaluate a smartphone-based program designed to support adults who smoke cigarettes. Participants will use the spark app to complete brief surveys during the day and a daily evening survey about their smoking urges, smoking, decisions not to smoke, and everyday experiences. Participants will also log cigarettes when they smoke. After some cigarette logs, participants will answer a few additional questions about their situation and feelings; after others, they will only log the cigarette. The study has three phases. In the first phase, participants will complete surveys and cigarette logs without receiving intervention messages. In the second phase, they will receive motivational messages at random times. In the third phase, message timing and content will be tailored using information collected during the earlier phases. The study will examine whether personalized motivational messages can help participants forgo smoking in daily life.

• Percentage of weekly smoking urge episodes in which smoking is forgone
• Number of cigarettes smoked per day

1. Study completion expected

   Sept 2027

2. Primary completion expected

   Jan 2027

3. Registered

   1 Oct 2026

4. Started

   20 Sept 2026