“Think you know everything neuro?” challenges the preview page for this app. “Push your mind to the limit…in this quiz with 90 randomized questions.” If your initial impression is that one cannot even begin to cover “everything neuro” in a mere 90 questions, you are absolutely correct. Still, while the NeuroKnowledge app may not be as comprehensive as advertised, it is still a good study tool for students of introductory neurobiology/psychopharmacology. The questions are divided into three categories: nervous system, neurons, and drug effects. Within each category, users progress through three levels (one must answer at least 4 out of 5 questions correct at each level to move to the next). The app allows students to track their progress. Beware opening this app during lecture—there is music that apparently cannot be toggled off within the app.