This is the dataset generated from the HeadOn clinical feasibility study which examined the usability and acceptability of a digital health intervention for concussion. The study took place between November 2021 to April 2022 and recruited 50 participants presenting with a concussion to the emergency department in Edinburgh, United Kingdom. The data covers the participants demographic, clinical findings, imaging and clinical outcomes.The data covers study participants demographics, clinical and imaging findings and a number of clinical outcomes. The data parameters are within labelled columns. Four outcome measures are included within the following range of columns: Glasgow Outcome Scale Extended: column AM; Mobile App Usability Questionnaire: columns AN - BD; Rivermead Post-concussion Questionnaire: columns BQ - CF; Patient Health Questionnaire 9: columns CG - CP