# EP QTc — Ultimate QTc calculator

> Medical app for calculating and analyzing corrected and predicted QT intervals. (iPhone/iPad app by EP Studios.)

- Source: https://appshunter.io/ios/app/ep-qtc/id1393849228 (this page in markdown: same URL + `.md`)
- Developer: [EP Studios](https://appshunter.io/developer/574231798)
- Category: Medical, Utilities
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 12+
- Requires: iOS 13.0 · 5 MB
- Languages: American English
- Released: 2018-07-10
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/ep-qtc/id1393849228/reviews.md

## What is EP QTc?

This app collects over 30 published formulas for calculating the corrected and predicted QT interval (QTc and QTp).  Included are details on each formula and reference links.  Results are analyzed statistically and graphed.  Published definitions of normal and abnormal QTc intervals are also included.

This is no ordinary calculator that just gives you the results of Bazett's formula.  If you are interested in this fascinating corner of electrocardiology, this app is for you.

## Key features

- 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


## Frequently asked questions about EP QTc

### What is EP QTc used for?

EP QTc is used to calculate and analyze corrected and predicted QT intervals (QTc and QTp) using over 30 different published formulas. It also provides statistical analysis, graphing, and definitions of normal and abnormal QTc intervals.

### How much does EP QTc cost?

EP QTc is a paid application, priced at $0.99. This one-time purchase grants access to all its features without any additional in-app purchases or subscriptions.

### What devices is EP QTc available on?

EP QTc is available on Mac, iPhone, iPad, and iPod. It is designed to function across various Apple devices, offering flexibility for users.

### How often is EP QTc updated?

The latest version of EP QTc is 1.10.0, last updated on February 11, 2026. While the last update date appears to be in the future, indicating potential scheduling or data entry anomaly, the app has a history of updates since its release in 2018.

### What is the age rating for EP QTc?

EP QTc has an age rating of 12+. This suggests it is suitable for users aged 12 and above, considering the medical nature of its content.

### Does EP QTc have ads?

No, EP QTc does not contain advertisements. As a paid application with no in-app purchases, it offers an ad-free experience for its users.

### What makes EP QTc different from other calculators?

EP QTc goes beyond basic calculations by offering over 30 different formulas, detailed explanations, reference links, and statistical analysis with graphing. It aims to provide a comprehensive tool for those interested in the nuances of electrocardiology.

## Version history (last 5 releases)

### 1.10.0 — 2026-02-11

Allow the choice of only one set of QT limits at a time.  Although the previous system could allow choosing criteria for both long and short QT intervals at the same time, some combinations of criteria made no real sense, so this version doesn't allow multiple criteria at the same time.
Fix some layout problems.
Update icon.

### 1.9.0 — 2024-02-08

Fix bug preventing opening links to source references

### 1.8.0 — 2021-06-08

Add navigation buttons to Help

### 1.7 — 2020-11-13

iOS and macOS versions combined into same app bundle

### 1.6 — 2020-09-21

Improved help screen
New icon

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## More apps by EP Studios

- [EP Mobile](https://appshunter.io/ios/app/ep-mobile/id574231795)
- [EP Coding](https://appshunter.io/ios/app/ep-coding/id836068604)
- [EP Calipers](https://appshunter.io/ios/app/ep-calipers/id982313078)
- [EP Diagram](https://appshunter.io/ios/app/ep-diagram/id1550836014)
- [MorbidMeter](https://appshunter.io/ios/app/morbidmeter/id1582566530)

All apps by EP Studios: https://appshunter.io/developer/574231798

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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.*