This research investigates Italian citizens’ attitudes towards the contact tracing app Immuni, promoted by the Italian government to track the spread of Covid19 and prevent possible future out-breaks. More specifically, this paper tries to uncover the factors that have motivated individuals to uptake the app or fail to do so. We have used a variety of qualitative methods: firstly, a virtual ethnography has been conducted, analyzing thematically 3013 tweets with the hashtag #Immuni. To further investigate the motivation behind either the adoption or the refusal of Immuni, twenty semi-structured interviews have been carried out with potential and actual users. A doctor and a health official have been also interviewed as secondary users. The results show that multiple factors shape users’ attitudes towards Immuni and influence their willingness to adopt it. The most relevant have to do with the perceived benefits, perceived barriers, perceived efficacy of the app and the cues to action. The usability of the overall app is also discussed with a focus on some of the key issues identified by the users.