BACKGROUND: Many countries around the world have developed mobile phone apps capable of supporting instantaneous contact tracing to control the Covid-19 pandemic. In France, a few people have downloaded and are using the StopCovid contact tracing app. Among them, students in the health domain are especially concerned. Exploring their usage and opinions about the app can inform improvements and diffusion of StopCovid among young people. OBJECTIVE: To investigate health-related students' knowledge, attitudes, beliefs and practices about the StopCovid app. METHODS: A field survey was conducted among 318 students at the health sciences campus of the University of Bordeaux, France, between September 25th and October 16th, 2020. Quota sampling method was used and descriptive statistics and univariate analyses were performed. RESULTS: A total of 77.3% (246/318) students had heard about the app, but only 11.3% (36/318) had downloaded it and 4.7% (15/318) were still using it at the time of the survey. Main reasons for not using the app were: belief that it was not effective given its limited diffusion (17.6%, 37/210), lack of interest (17.6%, 37/210) and distrust in data security and fear to be geo-located (15.7%, 33/210). Among those who had not heard about the app, after a brief description of its functioning and confidentiality policy, 52.7% (38/72) would use it. Participants reported that the main solution for increasing the use of the app would be a better communication (71.4%, 227/318). CONCLUSIONS: Even among health students the contact tracing app was poorly used. Findings suggest that improved communication describing its advantages and simplicity of use as well as clarifying false beliefs about it could help improving significantly its uptake.