EchoTools is a free iOS ultrasonography educational reference covering point-of-care ultrasound (POCUS), transthoracic echocardiography (TTE), and transesophageal echocardiography (TEE). Additionally, it contains cardiac dimensions, native/prosthetic valve measurements, and lessons ranging from interventional procedures to mechanical circulatory support. About Rishi Kumar, MD, FACC, CMQ ("RK.MD"): I'm an adult cardiothoracic anesthesiologist and cardiovascular intensivist with board certifications in anesthesiology, critical care medicine, adult cardiac anesthesiology, and advanced perioperative transesophageal and critical care echocardiography (CCEeXAM). I am passionate about teaching with free, open-access medical education! Learn more on my site: https://rk.md