Several studies have shown how students’ mental health is affected when they begin college. When starting college, their mental health can be influenced by emotional, social, or academic challenges. It is crucial to offer tools that support the mental well-being of this group. In this paper, we present the redesign and validation of the Emotions&Care app, a mobile application designed to support the mental health of college students. Using results from the latest validation session and applying Nielsen’s heuristics, we enhanced the app’s user interface design and conducted a validation session with 17 college students. Our results show that, although the app’s design has been improved, there are still critical issues to address to ensure its long-term use. These findings highlight the importance of evaluating digital mental health interventions, such as mobile apps, for their usability and acceptability among users, with the ultimate goal of enhancing students’ engagement with these apps.