Comparison

EchoRef vs ECHO On

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Point-of-care ultrasound (POCUS)
  • Transthoracic echocardiography (TTE)
  • Transesophageal echocardiography (TEE)
  • Cardiac dimensions and valve measurements
  • Hemodynamic and ultrasound calculations
  • Interventional procedure lessons
Features
Read full description

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

About

ECHO On

This medical education app helps users learn Transesophageal Echocardiography with a question bank, cognitive aid, case log, and reference library. It provides guidance on performing and interpreting a standard 28-view exam, including anatomy, function, and Doppler interrogations.

Highlights
  • Transesophageal Echocardiography education
  • Enlarging question bank
  • Rescue TEE cognitive aid
  • Case Log system
  • Perioperative Quick Reference library
  • Offline echo loops
  • Pathology, technique, and normal loop examples
Features
Read full description

ECHO On is a free medical education resource for learning Transesophageal Echocardiography including a free, enlarging question bank, a Rescue TEE cognitive aid, a Case Log system for submission to the NBE, and a growing perioperative Quick Reference library with offline echo loops that work even in the OR without internet access, and includes pathology examples, techniques, and normal loops of the heart. ECHO On will walk you through an entire standard 28 view exam teaching you the anatomy, function and Doppler interrogations you should perform at each view, and how to interpret them. ECHO On is and will remain free, and the best way you can contribute is to submit boards-style questions or echo stills and echo loops to help grow the QBank, Quick Reference and Pathology libraries. Disclaimer: This app was written to provide an accessible perioperative tool for residents and fellows learning TEE in the cardiac OR and ICU, and for generalist anesthesiologists looking to refresh their knowledge of TEE. It is not meant for patients to self-diagnose. It is not meant to be a definitive reference. Despite my best efforts, there may be errors or inaccuracies in this app, so please do not use it for medical decision making, as doing so may lead you misdiagnose or seriously harm your patient. If you are not a qualified medical doctor, please see a qualified medical doctor before making any medical decisions, including those based on echocardiograms.

Screenshots

EchoRef4 screens
ECHO On4 screens

Verdict

The call

The clearest difference is update cadence: ECHO On at weekly against EchoRef's every 2 months. ECHO On also leads on iOS requirement (15.6 vs 26.0). EchoRef's advantage is ratings volume (1.4K vs 14). On price, rating, review sentiment and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for EchoRef against 4.9 for ECHO On. That said, the two scores are not equally well evidenced: EchoRef has 1.4K ratings behind it against 14, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

EchoRef ships an update every 2 months, ECHO On weekly. The most recent releases landed on September 18, 2026 and September 10, 2026 respectively.

Scorecard3 real differences · 7 level
EchoRef versus ECHO On: the parameters behind the verdict, then further details
ParameterEchoRefECHO On
PriceFreeFree
Rating4.9 (1.4K ratings)4.9 (14 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1.4K — better14
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.6 — better
Further details — not scored
Size105 MB414 MB
Age rating17+12+
DeveloperRishi KumarRobert Arrigo

Customer experience

EchoRef

All ratings1,373 ratings
Positive97.2%
Neutral1.4%
Negative1.4%
Written reviews12 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ECHO On

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EchoRef

No in-app purchases

None

ECHO On

No in-app purchases

Questions

Is EchoRef free?
EchoRef is free to download, with no in-app purchases.
Is ECHO On free?
ECHO On is free to download, with no in-app purchases.
Which has better reviews, EchoRef or ECHO On?
EchoRef and ECHO On are both rated 4.9 out of 5 on the App Store, from 1.4K and 14 ratings respectively.
Do EchoRef or ECHO On have ads?
Neither EchoRef nor ECHO On shows ads.
Which is updated more often, EchoRef or ECHO On?
EchoRef ships an update every 2 months, and ECHO On weekly. Most recently, EchoRef was updated on September 18, 2026 and ECHO On on September 10, 2026.

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