Attention-Deficit / Hyperactivity Disorder (ADHD) is a frequent disorder not only among children, but also in adults. Especially for the latter, diagnostics is a challenge and objective biomarkers are lacking. In a clinical study in collaboration with Chartié Berlin and Forschungszentrum Jülich, PeakProfiling successfully predicted ADHD from the voice. With more than 1000 recordings from almost 700 participants, this is one of the biggest purely clinical studies ever conducted in the field. The success rates of the algorithms are comparable to single rating doctors.