People with COPD present inactive lifestyles and physical activity (PA) promotion is a major recommendation in disease management. Technology-based interventions may be useful, especially if tailored to the target population to improve adherence. We assessed the usability of the OnTRACK platform to promote PA through individualised goal setting and feedback: mobile application (app) for patients and web app for health professionals (HP).

Patients and HP were asked to complete 9 and 10 tasks, respectively, and rate how easy completing each task was, from 1 (I couldn?t complete it) to 5 (I completed it easily). Suggestions were recorded. In the end, participants completed the System Usability Scale (SUS; 10 questions, score 0-100%, higher scores indicate better usability).

15 patients with COPD (68±6 years, 80% male; 80% used smartphone, 80% internet, 20% wearables) and 22 HP (40±10 years, 86% female; all used computer, smartphone and internet; 64% wearables) participated. The easiness of task completion was 3.9±0.3 for patients and 4.6±0.3 for HP. The SUS score was 66±22 for patients and 88±10 for HP. Patients with experience using PA apps (n=5, 33%; 86±17) scored significantly higher in the SUS than those without experience (n=10, 67%; 56±19). Participants? main suggestions were related to information labels (n=8, 22%), graphical aspects (n=6, 16%) and improvement of the feature ?add new goal? (n=8, 22%). The need for guidance or tutorials to get the most of the apps was referred by 10 patients (67%) and 7 HP (32%).

Overall, end-users found the OnTRACK platform easy to use. Improvements in some features and inclusion of guidance/tutorials on how to use them, especially for patients, are still needed.