# Human Heart vs Cardiac Diary

The clearest difference is update cadence: Cardiac Diary at every 15 months against Human Heart's every 37 months. Human Heart's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Human Heart ships an update every 37 months, Cardiac Diary every 15 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Human Heart | Cardiac Diary |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 15 months** |
| Monetization | Free | — |
| Size | 131 MB | 26 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [The Open University](https://appshunter.io/developer/336747246) | [Hilmar Spohr](https://appshunter.io/developer/1713506814) |

## What reviewers say

### Human Heart

[App page](https://appshunter.io/ios/app/human-heart/id6443917882)

Explore a 3D, anatomically accurate human heart with augmented reality. Learn about its structure, function, and the cardiac cycle through interactive exploration, detailed pins, and adjustable beating rates.

**Highlights:** 3D anatomical heart model, Augmented reality view, Cross-section exploration, Interactive pins with descriptions, Blood flow visualization, Adjustable beating rate

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

**In-app purchases:** none


### Cardiac Diary

[App page](https://appshunter.io/ios/app/cardiac-diary/id6741710371)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Human Heart free?

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

### Is Cardiac Diary free?

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

### Do Human Heart or Cardiac Diary have ads?

Neither Human Heart nor Cardiac Diary shows ads.

### Which is updated more often, Human Heart or Cardiac Diary?

Human Heart ships an update every 37 months, and Cardiac Diary every 15 months. Most recently, Human Heart was updated on November 3, 2026 and Cardiac Diary on October 30, 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.*