# Human Anatomy AR 4D vs Smart Challenge

The clearest difference is in-app purchases: Smart Challenge at none against Human Anatomy AR 4D's 3. Smart Challenge also leads on update cadence (every 2 weeks vs every 49 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Human Anatomy AR 4D sells 3 one-off in-app purchases. Smart Challenge asks for nothing beyond the download.

Human Anatomy AR 4D ships an update every 49 months, Smart Challenge every 2 weeks. The most recent releases landed on October 28, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Human Anatomy AR 4D | Smart Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/smart-challenge/id1659636928/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 49 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 193 MB | 61 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Ibrahim Amer](https://appshunter.io/developer/1054899889) | [MOHAMMED ALAYOOB](https://appshunter.io/developer/1659636930) |

## What reviewers say

### Human Anatomy AR 4D

[App page](https://appshunter.io/ios/app/human-anatomy-ar-4d/id1581172239)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all Arabic section | $5.99 | one-time |
| Unlock all English section | $5.99 | one-time |
| Unlock all French section | $5.99 | one-time |


### Smart Challenge

[App page](https://appshunter.io/ios/app/smart-challenge/id1659636928)

This app facilitates classroom learning by enabling teachers to create question-based group challenges. Students earn points for correct answers, with the highest scorer declared the winner. It's designed to enhance engagement and competition within an educational setting.

**Highlights:** Group creation for challenges, Question-based learning, Point system for rewards, Competitive scoring, Classroom engagement tool

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Human Anatomy AR 4D free?

Human Anatomy AR 4D is free to download, with in-app purchases available.

### Is Smart Challenge free?

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

### Do Human Anatomy AR 4D or Smart Challenge have ads?

Neither Human Anatomy AR 4D nor Smart Challenge shows ads.

### Which is updated more often, Human Anatomy AR 4D or Smart Challenge?

Human Anatomy AR 4D ships an update every 49 months, and Smart Challenge every 2 weeks. Most recently, Human Anatomy AR 4D was updated on October 28, 2026 and Smart Challenge 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.*