# Multiplier vs Primal's 3D Shoulder

The clearest difference is in-app purchases: Multiplier at none against Primal's 3D Shoulder's 1. Multiplier also leads on iOS requirement (13.0 vs 15.0). Primal's 3D Shoulder's advantage is update cadence (every 5 weeks vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Primal's 3D Shoulder sells 1 one-off in-app purchase. Multiplier asks for nothing beyond the download.

Multiplier ships an update every 6 months, Primal's 3D Shoulder every 5 weeks. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Multiplier | Primal's 3D Shoulder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (24 ratings)](https://appshunter.io/ios/app/multiplier/id460335161/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | Paid | — |
| Size | 62 MB | 131 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [LifeBridge Health](https://appshunter.io/developer/460335164) | [Pharma Intelligence UK Ltd](https://appshunter.io/developer/1678054030) |

## What reviewers say

### Multiplier

[App page](https://appshunter.io/ios/app/multiplier/id460335161)

This app automates complex calculations for predicting mature height, bone length, and limb length discrepancies in children. It simplifies manual methods, reducing calculation time and errors for various orthopedic and growth-related assessments.

**Highlights:** Predict mature height, Calculate bone length, Assess limb length discrepancy, Analyze growth remaining, Plot height on CDC charts, Scanogram calculations, Foot length analysis

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

**In-app purchases:** none


### Primal's 3D Shoulder

[App page](https://appshunter.io/ios/app/primals-3d-shoulder/id1658793725)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Primal's 3D Shoulder | $39.99 | one-time |


## Frequently asked questions

### Is Multiplier free?

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

### Is Primal's 3D Shoulder free?

Primal's 3D Shoulder is free to download, with in-app purchases available.

### Do Multiplier or Primal's 3D Shoulder have ads?

Neither Multiplier nor Primal's 3D Shoulder shows ads.

### Which is updated more often, Multiplier or Primal's 3D Shoulder?

Multiplier ships an update every 6 months, and Primal's 3D Shoulder every 5 weeks. Most recently, Multiplier was updated on October 15, 2026 and Primal's 3D Shoulder on October 8, 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.*