MD on Call is a practical guide designed primarily for junior residents, interns, and medical students. This Android app is already trusted by thousands of physicians around the world, providing them with quick reference tips to manage the most common nighttime situations. The app includes 26 frequent on-call situations, common electrolyte abnormalities, normal and abnormal ECG values, suggestions on how to write orders for admission, comfort measures, on-call and procedure notes, management techniques for common problems such as a blocked NG tube, and a search function using acronyms or keywords. The app is intended to be used as a guide only and not as a replacement for clinical judgment. Before buying, make sure this app fits your needs.