Objective: The objective of the study was to implement a user-centred approach in the design and development of smartphone game-based applications (SGA) prototypes for PA promotion in adolescents, specifically from low SES families.

Aims: (1) Describe the development of smartphone game-based applications to promote physical activity in adolescents from primarily low socioeconomic status households. (2) Determine acceptability of initial prototypes.

Methods: This study implemented a user-centred approach including adolescent focus groups (n =3; 14 adolescents), parent interviews (n=7), and idea generation sessions (n=5; 80 participants) to develop and design smartphone applications as a persuasive technology for adolescents.

Results: Qualitative data demonstrated that adolescents identified smartphone features that would have the ability to have frequent opportunities for social networking and competition. The majority of parents had favourable perceptions of smartphone games for physical activity promotion. Furthermore, idea generating centred around sports and recreational games. A final set of games were developed into hand drawn and computer generated prototypes.

Conclusions: The study provides a framework for how to incorporate a user-centred approach in the design and prototype development of smartphone game-based applications, and indicates the feasibility of continued smartphone game-based applications development and effectiveness testing for promoting physical activity among low socioeconomic adolescents.

Background: HIV prevalence remains disproportionately high among youth, especially among young men who have sex with men, young people with substance use disorders, and recently incarcerated youth. However, youth may not report behavioral risks because they fear stigma or legal consequences. While routine HIV screening programs have increased testing, current programs are not designed to identify, or provide prevention services to, high-risk patients who test HIV negative.

Aims: To examine the feasibility and preliminary efficacy of: a tablet-based screening designed to facilitate HIV risk reporting and testing among a sample of young urban emergency department (ED) patients; and a text message-based follow up protocol for patients who test HIV-negative and report increased behavioral risk.

Methods: 100 ED patients aged 18–24, who declined HIV tests offered at triage, completed a tablet-based intervention that included a risk screening, an educational video, and offered participants HIV tests. If patients accepted testing and reported increased risk, the tablets offered follow-up text messages.

Results: 30 participants accepted HIV tests following the intervention and 21 participants, identified by custom software as high-risk, agreed to receive text messages. Two thirds (66.7%) of text recipients responded to questions at week 6, more than half (57.1%) responded at week 8, one (4.76%) re-tested after week 12.

Conclusion: Results indicate our intervention provides a feasible way to facilitate risk reporting, increase HIV testing, and maintain ongoing contact with hard-to-reach youth via tablet computers and text messages.