College students represent an important population for studying and understanding factors that influence sexual risk given the populations' high risk of sexually transmitted infections and unintended pregnancies. Using a quasi-experimental design, the efficacy of a brief and theory-driven mobile application intervention designed to decrease sexual risk behaviors among young college students (N = 118) was tested. Ninety-six percent (n = 114) of the participants showed an increase in contraceptive use knowledge from pretest to posttest (p = 0.013). Participants did not show a statistically significant change in intention to reduce sexual risk behaviors or actual risk reduction. This study supports the use of technology to educate college students about sexual health.