Table 1.

Structure of the mobile application rating scale questionnaire Stoyanov et al (2015) [67].

Section and subsection		Definition		Items
App quality
	A: Engagement		Fun, interesting, customizable, interactive (eg, sends alerts, messages, reminders, and feedback and enables sharing), and well targeted to audience		Entertainment Interest Customization Interactivity Target group
	B: Functionality		App functioning, easy to learn, navigation, flow logic, and gestural design of app		Performance Ease of use Navigation Gestural design
	C: Aesthetics		Graphic design, overall visual appeal, color scheme, and stylistic consistency		Layout Graphics Visual appeal
	D: Information		Contains high quality information (eg, text, feedback, measures, and references) from a credible source		Accuracy of app description Goals Quality of information Quantity of information Visual information Credibility Evidence base
App’s subjective quality		Contains subjective, personal opinion of the app, including recommendation to others, estimated usage, willingness to pay, and overall star rating		Likelihood of recommending the app to others Estimated usage over the next year Willingness to pay for the app Overall star rating
App-specific		Perceived impact of the app on the user’s knowledge, attitudes, and intentions to change as well as the likelihood of actual change in the target health behavior		Awareness Knowledge Attitudes Intention to change Help seeking Behavior change