Five higher themes and several subthemes resulted from the thematic analysis. QG users were generally more positive and receptive with regard to the app’s features, design, as well as information engagement and quality, compared with SF users. QG users also reported changing their perceptions and way of thinking with respect to smoking. It is possible that the root of this effect may lie in CBT, which gives users the opportunity to explore and change their thoughts and perceptions related to smoking.