# iRadTech ESP vs Skeleton 3D Anatomy

The clearest difference is price: Skeleton 3D Anatomy at Free against iRadTech ESP's $9.99. Skeleton 3D Anatomy also leads on update cadence (every 6 months vs every 24 months) and chart position (#172 vs unranked). iRadTech ESP's advantage is in-app purchases (none vs 8) and ads (none vs shown). On device support there is nothing between them.

Skeleton 3D Anatomy is free to download; iRadTech ESP costs $9.99 up front. Skeleton 3D Anatomy sells 8 in-app purchases, starting at $2.99 per 7 days. iRadTech ESP asks for nothing beyond the download.

iRadTech ESP ships an update every 24 months, Skeleton 3D Anatomy every 6 months. The most recent releases landed on September 22, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | iRadTech ESP | Skeleton 3D Anatomy |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[4.4 (181 ratings)](https://appshunter.io/ios/app/skeleton-3d-anatomy/id945084007/reviews)** |
| Number of ratings | — | **181** |
| Positive reviews | — | 56.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 24 months | **Every 6 months** |
| Monetization | — | Free |
| Best chart rank | — | **#172** |
| Size | 95 MB | 454 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Ballinger and Bruckner, LLP](https://appshunter.io/developer/692079862) | [Catfish Animation Studio](https://appshunter.io/developer/548684241) |

## What reviewers say

### iRadTech ESP

[App page](https://appshunter.io/ios/app/iradtech-esp/id563141602)

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

**In-app purchases:** none


### Skeleton 3D Anatomy

[App page](https://appshunter.io/ios/app/skeleton-3d-anatomy/id945084007)

**Currently charting:** #172 Top Grossing · Medical (US App Store)

Explore a highly detailed 3D model of the human skeleton. Rotate, zoom, and select individual bones to learn their anatomical terms in multiple languages. This tool is ideal for medical students and professionals seeking an in-depth understanding of skeletal anatomy.

**Highlights:** Detailed 3D skeletal models, Rotate and zoom functionality, Interactive anatomical term identification, Multi-language support (12 languages), Bone hiding and region division, Search function for anatomical parts

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly premium | $2.99 | per 7 days |
| Weekly premium | $2.99 | per 7 days |
| Weekly premium | $4.99 | per 7 days |
| Weekly premium | $4.99 | per 7 days |
| Yearly premium | $29.99 | per year |
| Yearly premium | $29.99 | per year |
| Yearly premium | $49.99 | per year |
| Yearly premium | $49.99 | per year |


## Frequently asked questions

### Is iRadTech ESP free?

iRadTech ESP costs $9.99, with no in-app purchases.

### Is Skeleton 3D Anatomy free?

Skeleton 3D Anatomy is free to download, with in-app purchases available.

### Do iRadTech ESP or Skeleton 3D Anatomy have ads?

Skeleton 3D Anatomy shows ads; iRadTech ESP does not.

### Which is updated more often, iRadTech ESP or Skeleton 3D Anatomy?

iRadTech ESP ships an update every 24 months, and Skeleton 3D Anatomy every 6 months. Most recently, iRadTech ESP was updated on September 22, 2026 and Skeleton 3D Anatomy on September 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.*