# 3DMedSim vs Skein.ch

The clearest difference is update cadence: Skein.ch at every 2 months against 3DMedSim's every 5 months. 3DMedSim's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

3DMedSim ships an update every 5 months, Skein.ch every 2 months. The most recent releases landed on June 11, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 3DMedSim | Skein.ch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (5 ratings)](https://appshunter.io/ios/app/3dmedsim-basic-life-support/id1037355529/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 287 MB | 31 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Momentum Bilgisayar Yazilim Danismanlik Ticaret AS](https://appshunter.io/developer/626732803) | [Appik Studio Sarl](https://appshunter.io/developer/1025795358) |

## What reviewers say

### 3DMedSim

[App page](https://appshunter.io/ios/app/3dmedsim-basic-life-support/id1037355529)

This app provides training for basic life support, following the latest ERC and AHA guidelines. It offers self-paced learning modules and timed tests, with multilingual support and AED usage instruction. Access requires membership to a training program.

**Highlights:** ERC 2021 & AHA 2020 algorithms, Self-paced training modules, Timed/tracked tests (SCORM X-Api), Multilingual support, AED usage training, Membership required

**Features:** macOS Compatibility

**In-app purchases:** none


### Skein.ch

[App page](https://appshunter.io/ios/app/skeinch/id6504457541)

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

**In-app purchases:** none


## Frequently asked questions

### Is 3DMedSim free?

3DMedSim is free to download, with no in-app purchases.

### Is Skein.ch free?

Skein.ch is free to download, with no in-app purchases.

### Do 3DMedSim or Skein.ch have ads?

Neither 3DMedSim nor Skein.ch shows ads.

### Which is updated more often, 3DMedSim or Skein.ch?

3DMedSim ships an update every 5 months, and Skein.ch every 2 months. Most recently, 3DMedSim was updated on June 11, 2026 and Skein.ch on September 23, 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.*