# Human Heart vs ReadingLog

The clearest difference is in-app purchases: Human Heart at none against ReadingLog's 1. Human Heart also leads on ads (none vs shown) and iOS requirement (12.0 vs 17.0). ReadingLog's advantage is update cadence (monthly vs every 37 months). On price and device support there is nothing between them.

Both are free to download. ReadingLog sells 1 in-app purchase, starting at $2.99 per month. Human Heart asks for nothing beyond the download.

Human Heart ships an update every 37 months, ReadingLog monthly. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Human Heart | ReadingLog |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 37 months | **Monthly** |
| Monetization | Free | — |
| Size | 131 MB | 32 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Open University](https://appshunter.io/developer/336747246) | [Tabish Hassan](https://appshunter.io/developer/1885918100) |

## 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


### ReadingLog

[App page](https://appshunter.io/ios/app/readinglog-book-tracker/id6762047246)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadingLog Premium | $2.99 | per month |


## Frequently asked questions

### Is Human Heart free?

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

### Is ReadingLog free?

ReadingLog is free to download, with in-app purchases available.

### Do Human Heart or ReadingLog have ads?

ReadingLog shows ads; Human Heart does not.

### Which is updated more often, Human Heart or ReadingLog?

Human Heart ships an update every 37 months, and ReadingLog monthly. Most recently, Human Heart was updated on October 9, 2026 and ReadingLog on October 10, 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.*