# DRU Classification — Distal Radius & Ulna

> Distal Radius & Ulna (iPhone/iPad app by Department of Orthopaedics and Traumatology, The University of Hong Kong.)

- Source: https://appshunter.io/ios/app/dru-classification/id1208011316 (this page in markdown: same URL + `.md`)
- Developer: [Department of Orthopaedics and Traumatology, The University of Hong Kong](https://appshunter.io/developer/1208011315)
- Category: Medical, Education
- Price: Free
- Age rating: 17+
- Requires: iOS 12.0 · 28 MB
- Languages: American English
- Released: 2017-03-24
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/dru-classification/id1208011316/reviews.md

## What is DRU Classification?

The distal radius and ulna (DRU) classification is an accurate parameter of a child’s maturity status. It is useful for management of spine and limb deformities as it can predict the peak growth spurt and growth cessation with good sensitivity and specificity. It has also been shown to be an indicator of scoliosis curve progression and predict which curves will deteriorate. This app provides users with a tool to understand the DRU classification, how to use the classification for grading skeletal maturity, and also for guiding treatment. In addition, this app has a calculation function for final body height prediction for female patients with idiopathic scoliosis.



Current features:

1. Explanation of the DRU classification

2. Distal radius and ulna features on x-rays for grading

3. DRU grading quiz

4. Final height prediction calculator 

5. Useful publications in this field of paediatric skeletal growth and scoliosis curve progression

 

Features to come:

1. Curve progression prediction

2. Image capture and automated grading and prediction


## Version history (last 3 releases)

### 2.0 — 2022-01-05

* Added Height Prediction feature
* App rewritten

### 1.1 — 2017-06-07

This app has been updated by Apple to display the Apple Watch app icon.

App optimization

### 1.0 — 2017-03-24

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-17.*