Touzani R. auteur aut IRD Schultz Emilien auteur aut IRD Vandentorren S. auteur aut IRD Arwidson P. auteur aut IRD Guillemin F. auteur aut IRD Bouhnik A. D. auteur aut IRD Rouquette A. auteur aut IRD Mancini J. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Objectives: To estimate the proportion of users of the TousAntiCovid app(lication) and identify factors associated with its non-use for contact tracing.Methods: We conducted an online survey of a quota sample of French adults between 8 and 18 January 2021. Three categories of TousAntiCovid use were considered: contact tracing, other or temporary usage, and no use. A weighted multiple logistic regression was performed to analyze the factors associated with these different uses.Results: Among the 1 000 respondents, 63.3% declared they had never downloaded the TousAntiCovid app, 23.5% used it for contact tracing. The remaining 13.2% did not enable contact tracing, mainly because of excessive battery consumption and fear of misuse of personal data. Trust in political representatives, financial deprivation and other factors were associated with never downloading the app. Conclusion: This study confirms the previously suggested links between trust in political representatives, financial deprivation and the use of contact tracing apps in France. specialized COVID-19 Mobile app Contact tracing HLS19 Precarious people TousAntiCovid FRANCE 050 052 122 171 104994 [5 ] 2023 1386-5056 https://www.documentation.ird.fr/hor/fdi:010087770 10.1016/j.ijmedinf.2023.104994 1386-5056 [F B010087770] https://www.documentation.ird.fr/hor/fdi:010087770 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2023-07/010087770.pdf IRD - Base Horizon / Pleins textes 2023-07-06 2025-02-24 fdi:010087770 fre