EchoRef 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, hemodynamic/ultrasound calculations, and lessons ranging from interventional procedures to mechanical circulatory support.
This app is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you may have regarding a medical condition, and never disregard or delay seeking professional advice because of information provided by this app.
About Rishi Kumar, MD, FACC ("RK.MD")
I'm an adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist practicing in academic medicine. I'm passionate about teaching with free, open-access medical education. Learn more on my site: https://rk.md
I appreciate this app so much! It provides great reference and it has recently been updated. And it’s great if you want to understand an have a visual of the cardiovascular system. And many other functions
Developer Response
That’s an incredibly kind review! Thank you!
Echo tools
John062311
I’m in school for adult echo and I love the app mainly because it has all the formulas in one location and convenient but all the other info and images are Extremely beneficial. Thank you for developing this helpful tool.
Developer Response
Thanks for the kind words and support!
Solid app
Katie4593
Really solid echo app with a ton of depth and detail. Well organized, easy to use, and genuinely useful for learning and real clinical work.
Great resource for anesthesia residents
ska020
CA2 on my echo rotation! Thank you for creating and offering this app for as a free resource! I am very excited to show my attending tomorrow in the OR.
Developer Response
Thanks so much for the kind words! Glad to know you like it!
Added: LA Volume by Biplane Area-Length, LV Volume/EF by Biplane Area-Length, Regurgitant Volume/Fraction by Volumetric Doppler, Aortic Size Index, LV Global Longitudinal Strain, RV Free-Wall Strain / 3D RVEF, Pseudo-MAD video
Added: Measurement Guides to the calculators
Updated: Implemented related-link improvements across the app
Updated: Improved performance and search algorithm
Version 6.1
The developer, Rishi Kumar, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Usage Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Rishi Kumar
Size
110.4 MB
Category
Medical
Compatibility
Requires iOS 26.0 or later.
iPhone Requires iOS 26.0 or later.
iPad Requires iPadOS 26.0 or later.
Mac Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
