A leading management consultancy was developing an app to help with the onboarding of new call centre staff, from the perspective of staff themselves (helping them to become familiar with the job requirements) and their managers (helping them to manage onboarding in a role where staff turnover is typically high). We recruited 70 call centre supervisors and workers to take part in a research programme that involved spending 15 minutes exploring a prototype version of the app, then answering an online survey about it, then taking part in a recorded 15-minute face-to-face or telephone interview with our moderator to provide qualitative feedback.