# AAOS Code vs What's the Skeletal Maturity?

The clearest difference is rating: What's the Skeletal Maturity? at 5.0 against AAOS Code's 2.3. What's the Skeletal Maturity? also leads on update cadence (monthly vs every 3 months) and ratings volume (10 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

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

What's the Skeletal Maturity? holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 10 respectively.

AAOS Code ships an update every 3 months, What's the Skeletal Maturity? monthly. The most recent releases landed on July 7, 2026 and June 6, 2026 respectively.

## The numbers

| Metric | AAOS Code | What's the Skeletal Maturity? |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/aaos-code-x-lite-web/id1502942520/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/whats-the-skeletal-maturity/id1564285837/reviews)** |
| Number of ratings | 3 | **10** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 148 MB | 95 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Computer Architechs International Corporation](https://appshunter.io/developer/412546531) | [Raymond Liu](https://appshunter.io/developer/1564285839) |

## What reviewers say

### AAOS Code

[App page](https://appshunter.io/ios/app/aaos-code-x-lite-web/id1502942520)

This medical reference app provides orthopaedic CPT codes, ICD-10 codes, and RVUs for quick access on mobile devices. It allows users to search by code or body site, email patient information with codes, calculate Work RVUs, and save favorite codes.

**Highlights:** Orthopaedic CPT codes, ICD-10 codes, RVU calculations, Search by code and body site, Email patient information, Favorite code tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### What's the Skeletal Maturity?

[App page](https://appshunter.io/ios/app/whats-the-skeletal-maturity/id1564285837)

This medical tool helps clinicians quickly estimate the skeletal age of pediatric patients. It supports multiple evidence-based ossification systems for various joints, including the hand, wrist, elbow, hip, and knee.

**Highlights:** Estimates skeletal age of pediatric patients, Uses evidence-based ossification systems, Supports multiple joint systems (shoulder, elbow, hand, wrist, hip, knee, heel), Rapid and accurate estimations, Utilizes orthopaedic radiographs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AAOS Code free?

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

### Is What's the Skeletal Maturity? free?

What's the Skeletal Maturity? is free to download, with no in-app purchases.

### Which has better reviews, AAOS Code or What's the Skeletal Maturity??

What's the Skeletal Maturity? is rated higher. AAOS Code averages 2.3 out of 5 from 3 ratings, while What's the Skeletal Maturity? averages 5.0 from 10 ratings.

### Do AAOS Code or What's the Skeletal Maturity? have ads?

Neither AAOS Code nor What's the Skeletal Maturity? shows ads.

### Which is updated more often, AAOS Code or What's the Skeletal Maturity??

AAOS Code ships an update every 3 months, and What's the Skeletal Maturity? monthly. Most recently, AAOS Code was updated on July 7, 2026 and What's the Skeletal Maturity? on June 6, 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.*