# DRU Classification vs Implant Identifier

The clearest difference is update cadence: Implant Identifier at every 3 weeks against DRU Classification's every 29 months. DRU Classification's advantage is iOS requirement (12.0 vs 15.5). 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.

DRU Classification ships an update every 29 months, Implant Identifier every 3 weeks. The most recent releases landed on September 13, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | DRU Classification | Implant Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (189 ratings)](https://appshunter.io/ios/app/implant-identifier/id1343366864/reviews)** |
| Number of ratings | — | **189** |
| Positive reviews | — | 63.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 128 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Department of Orthopaedics and Traumatology, The University of Hong Kong](https://appshunter.io/developer/1208011315) | [Devise Health](https://appshunter.io/developer/1006656243) |

## What reviewers say

### DRU Classification

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Implant Identifier

[App page](https://appshunter.io/ios/app/implant-identifier/id1343366864)

Instantly identify orthopedic and spine implants from X-rays using AI. This app helps medical professionals recognize unknown implants, access a community of experts, and contribute to a growing library of implant data. Features include AI identification for hips, a community feed for assistance, and a filterable implant library.

**Highlights:** AI-Identify for Hips, Community Feed for Expert Help, Filterable Implant Library, Submit New Implants, My Implants History, X-ray Recognition

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DRU Classification free?

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

### Is Implant Identifier free?

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

### Do DRU Classification or Implant Identifier have ads?

Neither DRU Classification nor Implant Identifier shows ads.

### Which is updated more often, DRU Classification or Implant Identifier?

DRU Classification ships an update every 29 months, and Implant Identifier every 3 weeks. Most recently, DRU Classification was updated on September 13, 2026 and Implant Identifier on September 26, 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.*