# Multiplier vs DRU Classification

The clearest difference is update cadence: Multiplier at every 7 months against DRU Classification's every 29 months. 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.

Multiplier ships an update every 7 months, DRU Classification every 29 months. The most recent releases landed on July 2, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Multiplier | DRU Classification |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 29 months |
| Monetization | Paid | — |
| Size | 62 MB | 28 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [LifeBridge Health](https://appshunter.io/developer/460335164) | [Department of Orthopaedics and Traumatology, The University of Hong Kong](https://appshunter.io/developer/1208011315) |

## 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

**In-app purchases:** none


### DRU Classification

[App page](https://appshunter.io/ios/app/dru-classification/id1208011316)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Multiplier free?

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

### Is DRU Classification free?

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

### Do Multiplier or DRU Classification have ads?

Neither Multiplier nor DRU Classification shows ads.

### Which is updated more often, Multiplier or DRU Classification?

Multiplier ships an update every 7 months, and DRU Classification every 29 months. Most recently, Multiplier was updated on July 2, 2026 and DRU Classification on September 13, 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.*