# ECGRef — ECG & Arrhythmia Reference

> ECG & Arrhythmia Reference for clinicians and learners. (iPhone/iPad app by Rishi Kumar.)

- Source: https://appshunter.io/ios/app/ecgref/id6757675855 (this page in markdown: same URL + `.md`)
- Developer: [Rishi Kumar](https://appshunter.io/developer/1434016052)
- Category: Medical, Reference
- Price: Free
- Rating: 4.90/5 from 27 App Store ratings · 2 written reviews indexed
- Age rating: 17+
- Requires: iOS 26.0 · 12 MB
- Languages: American English
- Released: 2026-01-13
- Data updated: 2026-08-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ecgref/id6757675855/reviews.md

## What is ECGRef?

ECGRef is a focused educational reference for clinicians and learners interpreting electrocardiograms, integrating core electrophysiology concepts, rhythm recognition, and clinically relevant patterns to support accurate bedside ECG analysis.

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

## Key features

- Electrophysiology concepts
- Rhythm recognition
- Clinically relevant patterns
- Bedside ECG analysis support
- Educational reference

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/ecgref/id6757675855/reviews.md

### 5/5 — Excellent presentation

*2026-02-03*

Easy to read and understand; clearly laid out and digestible.  It is very easy to navigate.  I would highly recommend for anyone working in healthcare!

**Developer response:** Thank you for the kind review!

### 5/5 — A must have

*2026-01-17*

A must-have ECG resource. Clear, practical, and well organized without being overwhelming. One of the more useful ECG apps out there! Thank you!

## Frequently asked questions about ECGRef

### What is ECGRef for?

ECGRef is an educational reference designed to help clinicians and learners interpret electrocardiograms by covering electrophysiology, rhythm recognition, and common patterns for accurate bedside analysis.

### Is ECGRef a medical device?

No, ECGRef is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment.

### Who developed ECGRef?

ECGRef was developed by Rishi Kumar, MD, FACC, an adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist passionate about open-access medical education.

### What devices does ECGRef support?

ECGRef is available for iPhone and iPad devices.

### How often is ECGRef updated?

The latest version, 1.2, was released on January 22, 2026, indicating recent updates to the application.

### What is the age rating for ECGRef?

ECGRef has an age rating of 17+, suggesting it contains content suitable for mature audiences.

### Does ECGRef have ads?

No, ECGRef does not contain advertisements.

### What is the user rating for ECGRef?

ECGRef has an excellent rating of 5.0 stars based on 8 user reviews.

## Version history (last 5 releases)

### 1.6 — 2026-07-21

Added: More content to terms
Updated: Patched calculator logic

### 1.5 — 2026-07-05

Added: Global search functionality
Added: Custom notes at the bottom of detail pages
Updated: Centralized external links, analytics, and note storage. Expanded global toolbar with persistent notes, universal search, and favorites. Enhanced details view, calculator copy buttons, and list sorting

### 1.4 — 2026-05-18

Updated: Bug fixes and codebase optimizations

### 1.3 — 2026-05-08

Added: Added and modified over 100 Terms
Updated: Adjusted user interface elements for Calculator and References tabs

### 1.2 — 2026-01-22

Added: Digoxin effect, Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC), Hypertrophic Cardiomyopathy (HCM), Dextrocardia, and Right Ventricular Outflow Tract (RVOT) Tachycardia, Wellens Syndrome, De Winter's T-Waves, and Sgarbossa Criteria rhythms
Added: Pinch-to-zoom functionality for the ECG images
Updated: Added a Differentiation section to rhythm information
Updated: Bug fixes

## More apps by Rishi Kumar

- [EchoRef](https://appshunter.io/ios/app/echoref/id1434016053)
- [CoagRef](https://appshunter.io/ios/app/coagref/id6748641864)
- [LabRef](https://appshunter.io/ios/app/labref/id6751020319)
- [EBMRef](https://appshunter.io/ios/app/ebmref/id6751447390)
- [VentRef](https://appshunter.io/ios/app/ventref/id6756503414)

All apps by Rishi Kumar: https://appshunter.io/developer/1434016052

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*