# CJOrtho vs DRU Classification

The clearest difference is update cadence: CJOrtho at every 6 months against DRU Classification's every 29 months. DRU Classification's advantage is iOS requirement (12.0 vs 16.0). 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.

CJOrtho ships an update every 6 months, DRU Classification every 29 months. The most recent releases landed on September 15, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | CJOrtho | DRU Classification |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 29 months |
| Monetization | Free | — |
| Size | 72 MB | 28 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Collège des Jeunes Orthopédistes](https://appshunter.io/developer/937704597) | [Department of Orthopaedics and Traumatology, The University of Hong Kong](https://appshunter.io/developer/1208011315) |

## What reviewers say

### CJOrtho

[App page](https://appshunter.io/ios/app/cjortho/id937704598)

This medical app assists orthopedic surgeons and health professionals in managing patients with musculoskeletal disorders. It offers tools for clinical evaluation, decision support, and pre- and post-operative follow-up, including classifications, clinical scores, and a goniometer.

**Highlights:** Orthopedic classifications, Clinical scores by joint, Goniometer tool, Patient database, Procedure progress tracking, Pre- and post-operative follow-up

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

**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 CJOrtho free?

CJOrtho 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 CJOrtho or DRU Classification have ads?

Neither CJOrtho nor DRU Classification shows ads.

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

CJOrtho ships an update every 6 months, and DRU Classification every 29 months. Most recently, CJOrtho was updated on September 15, 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.*