iElastance vs EchoRef
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iElastance
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iElastance is an application designed for calculate Ventricular Elastance, Arterial Elastance and Ventricular-Arterial Coupling using Echocardiographic derived values in a single beat determination. This application is extremely useful to a variety of health care givers such as Cardiologists, Intensivists, Anesthesiologist and more who want to calculate ventricular arterial coupling even in the Critical Care setting and, above all, bedside. The variables needed for the calculator to work are: Systolic Blood Pressure (mmHg) Diastolic Blood Pressure (mmHg) Stroke Volume (ml) Ejection Fraction (%) Pre Ejection Time (msec) Total Ejection Time (msec) Formulas are validated and extracted from the article by Chen CH et Al J Am Coll Cardiol. 2001 Dec;38(7):2028-34. DISCLAIMER: The calculator provided is not meant to be a substitute for professional advice and is not to be used for medical diagnosis. Extensive effort has been exerted to make this software as accurate as possible; however the accuracy of information provided by this software cannot be guaranteed. Health care professionals should use clinical judjement and individualize therapy to each patient care situation. All rights reserved - 2024 Pietro Bertini
EchoRef
This educational reference app provides comprehensive information on point-of-care ultrasound (POCUS), echocardiography, and cardiac measurements. It includes lessons on interventional procedures and hemodynamic calculations for medical professionals.
- Point-of-care ultrasound (POCUS)
- Transthoracic echocardiography (TTE)
- Transesophageal echocardiography (TEE)
- Cardiac dimensions and valve measurements
- Hemodynamic and ultrasound calculations
- Interventional procedure lessons
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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
Screenshots
Verdict
The clearest difference is update cadence: EchoRef at every 2 months against iElastance's every 8 months. iElastance's advantage is iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
iElastance ships an update every 8 months, EchoRef every 2 months. The most recent releases landed on October 4, 2026 and October 15, 2026 respectively.
| Parameter | iElastance | EchoRef |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (1.4K ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1.4K — better |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 22 MB | 105 MB |
| Age rating | 12+ | 17+ |
| Developer | Pietro Bertini | Rishi Kumar |
In-app purchases
iElastance
No in-app purchases
EchoRef
No in-app purchases









