# EP QTc vs ECG

The clearest difference is price: ECG at Free against EP QTc's $0.99. ECG also leads on update cadence (fortnightly vs every 7 months) and iOS requirement (12.0 vs 17.0). EP QTc's advantage is ads (none vs shown) and chart position (#190 vs unranked). On in-app purchases and device support there is nothing between them.

ECG is free to download; EP QTc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EP QTc ships an update every 7 months, ECG fortnightly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | EP QTc | ECG |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ep-qtc/id1393849228/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | Paid | — |
| Best chart rank | **#190** | — |
| Size | 8 MB | 37 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad, Mac | 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 QTc

[App page](https://appshunter.io/ios/app/ep-qtc/id1393849228)

**Currently charting:** #190 Top Paid · Medical (US App Store)

This medical app provides over 30 formulas for calculating corrected and predicted QT intervals (QTc and QTp). It includes details on each formula, reference links, statistical analysis, and graphing of results. Definitions of normal and abnormal QTc intervals are also provided.

**Highlights:** Over 30 QTc and QTp calculation formulas, Detailed formula information and references, Statistical analysis of results, Graphical representation of data, Definitions of normal/abnormal QTc intervals

**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 QTc free?

EP QTc costs $0.99, with no in-app purchases.

### Is ECG free?

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

### Do EP QTc or ECG have ads?

ECG shows ads; EP QTc does not.

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

EP QTc ships an update every 7 months, and ECG fortnightly. Most recently, EP QTc was updated on October 29, 2026 and ECG on October 27, 2026.

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