# Learn Endocrine System vs Hiro Stories

The clearest difference is review sentiment: Hiro Stories at 100% against Learn Endocrine System's 0%. Hiro Stories also leads on price (Free vs $2.99) and update cadence (every 3 weeks vs every 36 months). Learn Endocrine System's advantage is in-app purchases (none vs 4) and iOS requirement (11.0 vs 17). On ads and device support there is nothing between them.

Hiro Stories is free to download; Learn Endocrine System costs $2.99 up front. Hiro Stories sells 4 in-app purchases, starting at $7.99 per month. Learn Endocrine System asks for nothing beyond the download.

Learn Endocrine System ships an update every 36 months, Hiro Stories every 3 weeks. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Learn Endocrine System | Hiro Stories |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (11 ratings)](https://appshunter.io/ios/app/hiro-stories/id6670576510/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 3 weeks** |
| Monetization | **Paid** | Subscription |
| Size | 14 MB | 114 MB |
| Requires iOS | **11.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Nurten PIRLI](https://appshunter.io/developer/1495958705) | [Hiro Stories Inc.](https://appshunter.io/developer/1895277248) |

## What reviewers say

### Learn Endocrine System

[App page](https://appshunter.io/ios/app/learn-endocrine-system/id1502996208)

Master human endocrine physiology with this app. It offers quizzes, flashcards, and a glossary covering key topics like glands and disorders. Detailed statistics track your progress and quiz history.

**Highlights:** Quizzes on endocrine physiology, Flashcards for terms, Glossary of endocrine terms, Detailed statistics and progress tracking, Offline access, Covers major endocrine glands and disorders

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

**In-app purchases:** none


### Hiro Stories

[App page](https://appshunter.io/ios/app/hiro-stories/id6670576510)

This app lets children become the stars of their own stories by acting out scenes and creating short movies. It offers an expanding library of classic and original tales, emphasizing interactive play and human-created content for a secure, personal experience.

**Highlights:** Become the star of stories, Act out scenes, Create short movies, Interactive play, Human-created content, Private and secure

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $7.99 | per month |
| One Year Subscription | $19.99 | per year |
| hiropurchase | $3.99 | one-time |
| hirostories | $3.99 | one-time |


## Frequently asked questions

### Is Learn Endocrine System free?

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

### Is Hiro Stories free?

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

### Do Learn Endocrine System or Hiro Stories have ads?

Neither Learn Endocrine System nor Hiro Stories shows ads.

### Which is updated more often, Learn Endocrine System or Hiro Stories?

Learn Endocrine System ships an update every 36 months, and Hiro Stories every 3 weeks. Most recently, Learn Endocrine System was updated on October 15, 2026 and Hiro Stories on October 20, 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.*