The Thoracic Surgery Residents Association (TSRA) is the organization that represents next generation of Cardiac and Thoracic surgeons. As such, the TSRA has assembled a catalogue of educational materials for residents and fellows that are embarking on the arduous course of training. This app is the newest member of that catalogue and allows the user to test their knowledge base by answering multiple choice questions in the major disciplines associated with Thoracic Surgery: Adult Cardiac Surgery, Congenital Cardiac Surgery, General Thoracic Surgery, and Trauma and Critical Care. Each of the four disciplines is subdivided into important categories with about 10 questions for each subject. The user selects the best answer and is immediately notified if their choice was correct. The notification contains the correct answer and, usually, an explanation for the correct answer and the incorrect options. Answered questions are stored on the device as either answered correctly or answered incorrectly. This gives the user the opportunity to review their previous attempts. The questions can all be reset to allow the user to repeat the questions as needed.The TSRA members who submitted questions have made all attempts to insure the accuracy of the questions and answers. Nevertheless, unforeseen errors can occur. If any questions are suspected of being inaccurate, users are encouraged to avail themselves of the in-app Complaint Department by emailing the us with any issues. Additionally, the practice of medicine is not an exact science, and practice patterns do change over time. This app and its content is not meant to make recommendations for medical care. It is an educational tool only. Any medical decisions should be made after discussions with appropriate healthcare providers.