Force Diagram Coach is an offline practice tool for middle school and high school physics. It focuses on free body diagrams and force analysis, helping learners practice common mechanics models after class, before exams, or during tutoring. The app includes topic drills, step-by-step force checks, mistake review, and mastery statistics. No login is required, no network connection is used, and no personal data is collected. Practice records, mistakes, and statistics stay on the device.