 This study aims to test the feasibility, acceptability, and conceptual underpinnings of version 2 of the smiling instead of smoking. CIS2, smartphone app, which was developed specifically for non-daily smokers and uses a positive psychology approach. In a prospective, single group study, non-daily smokers. This article was authored by Bettina B. Happner, Caitlyn R. Siegel, Hannah A. Carlin, and others.