Table 3.

Features of Mobile Apps Designed for Adolescent Use, and Rating Criteria for App Evaluation (cont.)

Article	Platform	App Purpose	Preferred and Non-Preferred Features*	App Rating Criteria and Measures†
Condition: mental health
Kenny17	Not mentioned	Management of mental health in adolescents	Preferred features: multimedia features such as music and video included	1) Safety (confidentiality, cyber-bullying, social stigma); 2) Engagement (content, appearance, incentive to use); 3) Functionality (information, access to professional help, improved health outcomes, alternative emotional outlet); 4) Social interaction (communicating with peers, young people helping young people, relating to others' experiences); 5) Promoting awareness (word of mouth, online media, other popular media); 6) Accessibility (ease of use, free of cost); 7) Ability to tailor based on gender; 8) Young people in control.
			Non-preferred features: large blocks of text
Condition: organ transplant
Shellmer25	Android	Medication adherence after solid organ transplant in adolescents	Preferred features: access to medication list, alerts for changes to medication list, access to medication adherence history, automatic messaging to caregiver to support medication taking	1) Ease of use; 2) Simplicity of reminders and warning messages; 3) Satisfaction with the app and its use; 4) Appeal of using the app for a long time period.
Condition: pain
Jibb27	Apple	Pain management in adolescents	Preferred features: real-time pain assessment	1) Ease of use; 2) Ease of understanding; 3) Efficiency; 4) Acceptability (design, content, navigation, utility, customizability).
			Non-preferred features: excessive number of steps required to complete functions (navigation), software malfunction (app crashing), poor responsiveness of buttons, complicated text
Stinson26	Apple	Pain management in adolescents	Preferred features: gamification, audible alarms, color scheme, font, and graphics	1) Likeability; 2) Overall appearance; 3) Ease of use; 4) Interference with daily activities and friendships.
			Non-preferred features: complicated text
Condition: sexual health
Gkatzidou22	Not mentioned	Management of sexual health in adolescents	Preferred features: colors that reflect credibility, help functions, credibility of language	1) Social privacy (password protection, privacy settings, discreet design); 2) Institutional privacy (assurances and disclaimers, disclosures, confidentiality and security policy); 3) Credibility and legitimacy (language, visual aesthetics, user community cues, affiliations, identification of app operator, assurances of medical content accuracy); 4) User journey support (simplification of complex health journeys: visual trackers, overviews, content relevance and logic, specific and appropriate feedback, reassurances, flexibility in the delivery of support); 5) Task-technology-context fit (ubiquity, mobility, customization).
Condition: sickle cell disease
Crosby24	Not mentioned	Self-management of sickle cell disease in adolescents	Preferred features: visualization of self-management progress, customizable profile and goals, social interaction via text messages, ability to perform team competitions	Measured on a 0 to 5 scale: 1) Ease of use; 2) Benefit for tracking symptoms; 3) Degree of tailoring to suit user needs; 4) Extent of ability to choose self-management goals; 5) Extent of ability to communicate with others about self-management strategies; 6) Extent of peer support functions.

^* Preferred and non-preferred features are from the perspective of adolescents.

^† Rating criteria were reported by the study authors and were used by study participants (adolescents, parents, or providers) to evaluate the apps for adolescent use across a range of usability factors.