"Version 2 of the Smoking Cessation Smartphone App Smiling Instead of Smoking (SiS)"

The investigators have developed a smartphone app that acts as a behavioral, in-the-pocket coach and uses positive psychology exercises to enhance quitting success. It is anonymous, portable, and provides just-in-time support, an important feature for smokers who smoke under specific conditions and circumstances. To support treatment, investigators use a positive psychology approach. The smartphone app administers positive psychology exercises to enhance and/or maintain positive affect, which is hypothesized to stimulate nondaily smokers to enact healthier alternatives to smoking by broadening their thought-action repertoire, increasing confidence, and decreasing craving and defensiveness about smoking-related health information.