Comparison

DRU Classification vs Implant Identifier

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DRU Classification

Features
Read full description

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

About

Implant Identifier

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
Read full description

Implant Identifier is the fastest way to identify unknown orthopedic and spine implants from x-ray. Now you can instantly identify spine, hip, knee, and shoulder implants with AI. Join our mission to create the world’s most intelligent implant identification platform—powered by AI, built by the community. The new app includes: AI-Identify for Spine, Hip, Knee, and Shoulder – Snap an x-ray and let AI suggest the closest matching implants. Home Feed (Community) – Can't find a match? Ask expert's in our community of surgeons and reps worldwide. Library with Filters – Browse and filter hundreds of common spine and orthopedic implant x-rays. Submit New Implants – Contribute to the growing AI-library and help others in the community. My Implants- Access your previously identified and unidentified implants and share them with your colleagues.

Screenshots

DRU Classification4 screens
Implant Identifier4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DRU Classification ships an update every 29 months, Implant Identifier every 3 weeks. The most recent releases landed on September 13, 2026 and September 22, 2026 respectively.

Scorecard2 real differences · 8 level
DRU Classification versus Implant Identifier: the parameters behind the verdict, then further details
ParameterDRU ClassificationImplant Identifier
PriceFreeFree
Rating—4.6 (189 ratings) — better
Positive reviews—63.3% of reviews
Number of ratings—189 — better
Update frequencyEvery 29 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.5
Further details — not scored
Size28 MB128 MB
Age rating17+12+
DeveloperDepartment of Orthopaedics and Traumatology, The University of Hong KongDevise Health

In-app purchases

None

DRU Classification

No in-app purchases

None

Implant Identifier

No in-app purchases

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 22, 2026.

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