There is a tremendous unmet need for health care provider guidance on managing the sexual health of young adults with intellectual disabilities. The first step in addressing sexuality in this population is establishing comprehension of social boundaries. This pilot study tested the usefulness of the Circles® app in teaching appropriate social boundaries to six young adult females with Down syndrome as a basis for further education on healthy sexuality in the clinic setting. Following implementation of the Circles® app, participant comprehension of appropriate social boundaries improved from baseline, supporting the need for further research on the Circles® app in this population.