{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T23:06:10Z","timestamp":1779404770808,"version":"3.53.1"},"reference-count":0,"publisher":"IOS Press","isbn-type":[{"value":"9781643686615","type":"electronic"}],"license":[{"start":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T00:00:00Z","timestamp":1779321600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,5,21]]},"abstract":"<jats:p>Post-COVID fatigue is a common and burdensome symptom that fluctuates throughout the day, making it difficult to assess within clinical visits. To capture post-COVID symptom fatigue in daily settings, we developed a mobile research app based on a previous survey-based tool, designed as a progressive web application (PWA) using React. The app combines offline functionality, flexible testing times, visual instructions and local storage of participant data. The development was guided by a requirements analysis conducted through interviews with patients, identifying core needs for usability, flexibility and personalized tracking. Compared to a survey-based tool, key improvements include reduced cognitive load, a modern, minimalist design and optimization for mobile devices. Technical tests across Android and iOS devices confirmed stable and compatible performance. Future work includes a systematic usability and feasibility evaluation with both healthy participants and post-COVID patients. The application provides a flexible, user-friendly platform for symptom tracking for post-COVID studies and has potential for further development into self-management for patients.<\/jats:p>","DOI":"10.3233\/shti260498","type":"book-chapter","created":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T22:06:45Z","timestamp":1779401205000},"source":"Crossref","is-referenced-by-count":0,"title":["A Mobile Research App for Post-COVID Fatigue Monitoring"],"prefix":"10.3233","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-6531-226X","authenticated-orcid":false,"given":"Marcel","family":"Weber","sequence":"first","affiliation":[{"name":"Big Data in Medicine, Department of Health Services Research, Carl von Ossietzky Universit\u00e4t Oldenburg, Oldenburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-8059-5719","authenticated-orcid":false,"given":"Ann-Kathrin","family":"Knak","sequence":"additional","affiliation":[{"name":"Big Data in Medicine, Department of Health Services Research, Carl von Ossietzky Universit\u00e4t Oldenburg, Oldenburg, Germany"},{"name":"Psychological Methods and Statistics, Department of Psychology, Carl von Ossietzky Universit\u00e4t Oldenburg, Oldenburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2550-2627","authenticated-orcid":false,"given":"Antje","family":"Wulff","sequence":"additional","affiliation":[{"name":"Big Data in Medicine, Department of Health Services Research, Carl von Ossietzky Universit\u00e4t Oldenburg, Oldenburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"7437","container-title":["Studies in Health Technology and Informatics","Opening the Personal Gate between Technology and Health Care"],"original-title":[],"link":[{"URL":"https:\/\/ebooks.iospress.nl\/pdf\/doi\/10.3233\/SHTI260498","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T22:06:45Z","timestamp":1779401205000},"score":1,"resource":{"primary":{"URL":"https:\/\/ebooks.iospress.nl\/doi\/10.3233\/SHTI260498"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,5,21]]},"ISBN":["9781643686615"],"references-count":0,"URL":"https:\/\/doi.org\/10.3233\/shti260498","relation":{},"ISSN":["0926-9630","1879-8365"],"issn-type":[{"value":"0926-9630","type":"print"},{"value":"1879-8365","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,5,21]]}}}