# Designing an App to Facilitate Self-Management in Young Adult Survivors of Childhood Cancer: Development and Usability Study

## TL;DR

A mobile app was developed to help young adult survivors of childhood cancer manage their health, and usability testing showed it was well-received and useful.

## Contribution

The study presents a user-centered design and usability evaluation of a mobile app aimed at improving transition readiness for young adult cancer survivors.

## Key findings

- The app was rated highly on usability, technology acceptance, and aesthetic appeal by young adult survivors.
- Participants suggested improvements like enhancing quiz interactivity and providing feedback on correct answers.
- The iterative design process successfully incorporated user feedback to refine the app for a future efficacy trial.

## Abstract

Young adult survivors of childhood cancer are at risk for late and long-term effects from their treatment, and less than 1 in 5 obtain risk-based care in adulthood. Transitioning young adult survivors from pediatric, parent-driven care to adult, self-driven care is a challenging process during which young adults face multiple barriers. Intervening during this period may facilitate better transition readiness. For this purpose, we previously developed the Managing Your Health (MYH) web-based intervention, which showed initial feasibility and acceptability; however, young adult participants wanted to access the intervention through a mobile app.

We used an iterative, cocreation design process to translate, build, and evaluate the usability of the MYH web-based intervention into a mobile app to be used in a future peer-mentoring educational intervention.

In phase 1, we conducted key informant workshops with 3 stakeholder groups to understand target users’ needs and expectations related to the content and design of the mobile app. In phase 2, we conducted usability testing with young adult survivors of childhood cancer to evaluate the app’s usability and subjective appeal.

Participants in the key informant workshops (n=13) agreed that the content of the proposed app matched the barriers faced by young adult survivors of childhood cancer. Participants provided suggestions about the design of the app, including content and features, although there were mixed views about the inclusion of gamification features. Usability testing participants (n=25) rated the app highly on measures of technology acceptance, usability, and aesthetic appeal. Participants’ qualitative comments suggested that they found the app to be useful, easy to use, and likable or familiar relative to other existing apps. Participants suggested a variety of features to enhance the app, including adding features to enhance usability and reformatting certain aspects of the app to enhance interactivity and feedback to the user. Suggestions with uniformly positive reports were used to refine the app, while suggestions with mixed enthusiasm were not prioritized in refining the app.

We engaged target users of an educational app in an iterative app design process to create a product that would meet the needs and expectations of those users. Results suggested that the app was generally viewed as acceptable, useful, and visually appealing. Common suggestions for improvement, such as reformatting quizzes to enhance interactivity and provide feedback regarding correct answers, were used to refine the app. The refined app will be used in the future intervention efficacy trial.

ClinicalTrials NCT06763770; https://clinicaltrials.gov/study/NCT06763770