# Learn Immune System vs Human Reproductive System

The clearest difference is price: Human Reproductive System at $1.99 against Learn Immune System's $2.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Learn Immune System costs $2.99 and Human Reproductive System $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn Immune System ships an update every 36 months, Human Reproductive System every 35 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | Learn Immune System | Human Reproductive System |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 35 months** |
| Size | 16 MB | 145 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Nurten PIRLI](https://appshunter.io/developer/1495958705) | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) |

## What reviewers say

### Learn Immune System

[App page](https://appshunter.io/ios/app/learn-immune-system/id1502997625)

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

**In-app purchases:** none


### Human Reproductive System

[App page](https://appshunter.io/ios/app/human-reproductive-system/id1534541160)

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

**In-app purchases:** none


## Frequently asked questions

### Is Learn Immune System free?

Learn Immune System costs $2.99, with no in-app purchases.

### Is Human Reproductive System free?

Human Reproductive System costs $1.99, with no in-app purchases.

### Do Learn Immune System or Human Reproductive System have ads?

Neither Learn Immune System nor Human Reproductive System shows ads.

### Which is updated more often, Learn Immune System or Human Reproductive System?

Learn Immune System ships an update every 36 months, and Human Reproductive System every 35 months. Most recently, Learn Immune System was updated on October 27, 2026 and Human Reproductive System on October 27, 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.*