# EP Calipers vs ECG

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 (#154 vs unranked). On in-app purchases and device support there is nothing between them.

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.

## The numbers

| Metric | EP Calipers | ECG |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/ep-calipers/id982313078/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Paid | — |
| Best chart rank | **#154** | — |
| Size | 14 MB | 37 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [EP Studios](https://appshunter.io/developer/574231798) | [Putu Angga Risky Raharja](https://appshunter.io/developer/1164107753) |

## What reviewers say

### EP Calipers

[App page](https://appshunter.io/ios/app/ep-calipers/id982313078)

**Currently charting:** #154 Top Paid · Medical (US App Store)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


### ECG

[App page](https://appshunter.io/ios/app/ecg-corrected-qt-interval/id1575723032)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EP Calipers free?

EP Calipers costs $1.99, with no in-app purchases.

### Is ECG free?

ECG is free to download, with no in-app purchases.

### Do EP Calipers or ECG have ads?

ECG shows ads; EP Calipers does not.

### Which is updated more often, EP Calipers or ECG?

EP Calipers ships an update every 3 months, and ECG fortnightly. Most recently, EP Calipers was updated on October 24, 2026 and ECG on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*