# Hematox vs QTc

The clearest difference is price: QTc at Free against Hematox's $3.99. Hematox's advantage is iOS requirement (16.0 vs 27.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

QTc is free to download; Hematox costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hematox ships an update every 3 months, QTc every 4 months. The most recent releases landed on October 8, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Hematox | QTc |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[4.7 (51 ratings)](https://appshunter.io/ios/app/qtc-calculator/id1354439139/reviews)** |
| Number of ratings | — | **51** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | — | Free |
| Size | 1 MB | 1 MB |
| Requires iOS | **16.0** | 27.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Pierre Chaillet](https://appshunter.io/developer/481949152) | [Marian Stiehler](https://appshunter.io/developer/1354439138) |

## What reviewers say

### Hematox

[App page](https://appshunter.io/ios/app/hematox/id489752018)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### QTc

[App page](https://appshunter.io/ios/app/qtc-calculator/id1354439139)

This medical app calculates QTc using nine different formulas. It allows users to input heart rate or RR interval and QT interval length for quick results. An Apple Watch app is also included for convenient access.

**Highlights:** Nine QTc calculation formulas, Input heart rate or RR interval, Input QT interval length, Apple Watch app integration, No personal data collection, Offline functionality

**In-app purchases:** none


## Frequently asked questions

### Is Hematox free?

Hematox costs $3.99, with no in-app purchases.

### Is QTc free?

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

### Do Hematox or QTc have ads?

Neither Hematox nor QTc shows ads.

### Which is updated more often, Hematox or QTc?

Hematox ships an update every 3 months, and QTc every 4 months. Most recently, Hematox was updated on October 8, 2026 and QTc on October 26, 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.*