EP Calipers vs ECG
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EP Calipers
This medical app allows users to measure intervals and angles on electrocardiogram (ECG) images. It's designed for healthcare professionals to accurately analyze ECGs from photos or PDFs, aiding in calculations like heart rate and QT intervals.
- Measure ECG intervals
- Measure ECG angles
- Calculate mean heart rate
- Determine corrected QT interval
- Analyze ECG photos and PDFs
- Supports Brugada syndrome beta angle measurement
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EP Calipers provides electronic calipers to measure intervals on images of electrocardiograms (ECGs) or electrophysiologic recordings. Doctors, nurses and medical technicians photograph and send ECGs to each other via email and messaging using smart phones and tablets. It is difficult and inaccurate to make measurements on these images with mechanical calipers. EP Calipers can be used to make accurate ECG measurements and do calculations such as determining mean heart rate and corrected QT interval. Angles such as the beta angle in Brugada syndrome can be measured as well. Analyze ECG images you photograph or store on your device, as well as PDF files, such as ECGs generated by the AliveCor Kardia™ device.
ECG
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"ECG - Corrected QT Interval: Electrocardiogram Rhythm App” is designed to help health professional to assess the QT interval from an electrocardiogram (ECG) result. The QT interval in electrocardiogram (ECG) is representing ventricles depolarization and repolarization. Why should you choose "ECG - Corrected QT Interval: Electrocardiogram Rhythm App"? - Simple and very easy to use. - Accurate and precise calculation. - There are three formulas (Bazzet, Fredericia, and Framingham) to calculate corrected QT interval (QTc) - It is totally free. Download now! The QT interval is affected by heart rates, so we need to calculate the corrected QT interval (QTc). The corrected QT interval (QTc) will estimate the QT interval at a heart rate of 60 beats per minute. Prolonged corrected QT interval (QTc) is associated with ventricular arrhythmias, especially Torsades de Pointes. "ECG - Corrected QT Interval: Electrocardiogram Rhythm App" app is a practical medical calculator to calculate the corrected QT interval (QTc). In "ECG - Corrected QT Interval: Electrocardiogram Rhythm App", the user need to input the QT interval (in millisecond) and heart rate (in beats per minute) to calculate the corrected QT interval (QTc). "ECG - Corrected QT Interval: Electrocardiogram Rhythm App" have three available formulas, namely Bazzet, Fredericia, and Framingham. Disclaimer: all calculations must be re-checked and should not be used alone to guide patient care, nor should they substitute for clinical judgment. Calculations in this “ECG - Corrected QT Interval: Electrocardiogram Rhythm App” app might be different with your local practice. Consult to expert doctor whenever necessary.
Screenshots
Verdict
The clearest difference is price: ECG at Free against EP Calipers's $1.99. ECG also leads on update cadence (fortnightly vs every 3 months) and iOS requirement (12.0 vs 17.6). EP Calipers's advantage is ads (none vs shown) and chart position (#126 vs unranked). On 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
ECG is free to download; EP Calipers costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
EP Calipers ships an update every 3 months, ECG fortnightly. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.
| Parameter | EP Calipers | ECG |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 2.3 (6 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #126 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 37 MB |
| Age rating | 12+ | 12+ |
| Developer | EP Studios | Putu Angga Risky Raharja |
In-app purchases
EP Calipers
No in-app purchases
ECG
No in-app purchases









