We developed an online survey and sent an email invitation to 4144 individuals, who had previously or were at thetime using the Quit Genius mHealth app, to encourage participation in the study. We matched the online survey data with objectiveapp usage data of the study participants.A dataset of 190 completed responses was used. At the time of the survey, respondents had completed an average of60% of the CBT program in the Quit Genius mHealth app. Of the respondents, 36.3% (69/190) noted to have quit smokingsuccessfully after using the Quit Genius app. As for those who remained smokers after using the app (N=121), the number ofcigarettes smoked per day was significantly reduced by 59.6%. The ability of the app to enhance users’ hedonic well-being andpsychologically empower them in their daily lives was identified as being key in helping users quit smoking. Specifically, theresults show that users whose well-being was enhanced through the app were 1.72 times more likely to quit smoking successfully.Moreover, a one-unit increase on a 7-point Likert scale in the app’s ability to empower smokers in their daily lives led to areduction of cigarettes smoked per day of 53%. The app’s inspiration to users, however, was negatively associated with quittingsuccess and the reduction in cigarette smoked per day.The findings offer important insights for the effective design of digital mHealth apps. Specifically, we find that perceived psychological empowerment and enhanced hedonic well-being from the mobile solution may be a more impactful way to support the effectiveness of mobile cognitive behavioral therapy for smoking cessation than eliciting strong inspiration.