# Istel ECG vs QT ECG

The clearest difference is rating: QT ECG at 3.4 against Istel ECG's 3.0. QT ECG also leads on ratings volume (5 vs 1). Istel ECG's advantage is iOS requirement (10.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QT ECG holds the better App Store score, 3.4 against 3.0. That said, the two scores are not equally well evidenced: QT ECG has 5 ratings behind it against 1, so its average is the more settled of the two.

Istel ECG ships an update every 3 months, QT ECG every 2 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Istel ECG | QT ECG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/istel-ecg/id1238398630/reviews) | **[3.4 (5 ratings)](https://appshunter.io/ios/app/qt-ecg/id1457528665/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 22 MB | 58 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Diagnosis S.A.](https://appshunter.io/developer/1238398629) | [QT Medical, Inc.](https://appshunter.io/developer/1074095246) |

## What reviewers say

### Istel ECG

[App page](https://appshunter.io/ios/app/istel-ecg/id1238398630)

This application works with a compatible recorder to perform quick ECG tests. It displays heart electrical activity, stores measurement history, and allows for easy sharing of results. Configuration of device parameters and PDF export are also supported.

**Highlights:** Real-time ECG signal display, Measurement history tracking, Built-in browser for interpretation, Device parameter configuration, Export measurements to PDF, Share measurement results

**In-app purchases:** none


### QT ECG

[App page](https://appshunter.io/ios/app/qt-ecg/id1457528665)

Record and transmit high-quality 12-lead ECGs for physician interpretation. This app connects to compatible smart devices via Bluetooth to display and send ECG data to a secure cloud. An account with the developer is required for use.

**Highlights:** Hospital-quality 12-lead ECG recording, Bluetooth connectivity to smart devices, HIPAA/GDPR-compliant cloud transmission, Physician interpretation ready, High-quality ECG display

**In-app purchases:** none


## Frequently asked questions

### Is Istel ECG free?

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

### Is QT ECG free?

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

### Which has better reviews, Istel ECG or QT ECG?

QT ECG is rated higher. Istel ECG averages 3.0 out of 5 from 1 ratings, while QT ECG averages 3.4 from 5 ratings.

### Do Istel ECG or QT ECG have ads?

Neither Istel ECG nor QT ECG shows ads.

### Which is updated more often, Istel ECG or QT ECG?

Istel ECG ships an update every 3 months, and QT ECG every 2 months. Most recently, Istel ECG was updated on November 2, 2026 and QT ECG on November 2, 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.*