Highlights ■ The Baritrip app offers multidisciplinary guidance for bariatric surgery patients. ■ The app was validated by experts, yielding a high content validity index of 0.99. ■ Users rated the app engagement, layout, and organization with 89.1% agreement. ■ The app supports health literacy, pre and post-surgical care through an inclusive approach. ABSTRACT Objective: To develop and validate a comprehensive mobile health App (mHealth App) to increase the health literacy and care engagement of patients undergoing bariatric surgery. Methods: […]