In the midst of the SARS-CoV-2 pandemic, also known as Covid-19, there has been an intensified dialogue between health and technological measures to combat and contain the virus. In this context, this paper aims to study the possible surveillance logic that permeates the contact-tracing applications used to combat the pandemic. Drawing on the concepts of Surveillance Capitalism and surveillance culture, it starts from a theoretical development, anchored in the empirical analysis of the Singapore case, guided by the Rules of Inference developed by Epstein and King, in order to verify whether the deviation of purpose in the app's usage represents a reinforcement of the surveillance logic in place. In the end, we conclude that, depending on their content, the changes made in privacy policies may reinforce a logic of surveillance that especially affects historically persecuted and marginalized populations