EP Calipers vs DeviceAID
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.
DeviceAID
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DeviceAID is an educational application with many categories of devices used in both diagnostic Cath as well as interventional cardiology. With hundreds of devices to keep in your head, having a tool to get to the key few numbers can be invaluable. A basics section introduces devices, and the library section allows for the searching and filtering of devices based on some key characteristics. Current sections include Catheters, stents, balloons, atherectomy devices, access, closure, and more. Devices can be added to your personal favorites list for easy access later. For those who want to refine their knowledge of devices, quizzes with correct answer explanations are available.
Screenshots
Verdict
The clearest difference is price: DeviceAID at Free against EP Calipers's $1.99. EP Calipers's advantage is ads (none vs shown) and update cadence (every 3 months vs every 14 months). 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
DeviceAID 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, DeviceAID every 14 months. The most recent releases landed on September 13, 2026 and May 17, 2026 respectively.
| Parameter | EP Calipers | DeviceAID |
|---|---|---|
| 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 — better | Every 14 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #159 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 9 MB | 60 MB |
| Age rating | 12+ | 12+ |
| Developer | EP Studios | Cardiology Apps LLC |
In-app purchases
EP Calipers
No in-app purchases
DeviceAID
No in-app purchases









