# AcetabularIndex vs DIAX

The clearest difference is price: AcetabularIndex at $2.99 against DIAX's $19.99. DIAX's advantage is iOS requirement (11.0 vs 15.4). On rating, ratings volume, update cadence and ads there is nothing between them.

AcetabularIndex costs $2.99 and DIAX $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for AcetabularIndex against 5.0 for DIAX. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Both ship on a similar rhythm, roughly every 11 months. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | AcetabularIndex | DIAX |
| --- | --- | --- |
| Price | **$2.99** | $19.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/acetabularindex/id1292735334/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/diax-bone-age/id1296654435/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | Every 11 months |
| Monetization | Paid | Paid |
| Size | 1 MB | 45 MB |
| Requires iOS | 15.4 | **11.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) | [SANTOS DIAS MEDICAL CARE SS](https://appshunter.io/developer/1296654434) |

## What reviewers say

### AcetabularIndex

[App page](https://appshunter.io/ios/app/acetabularindex/id1292735334)

This medical software assists orthopedic surgeons in evaluating hip dysplasia by measuring the acetabular index from X-rays. It simplifies angle measurement, compares results to normal reference values based on patient age, sex, and side, and categorizes hip dysplasia.

**Highlights:** Import medical images from camera or photos, Accurate angle measurement with a circular template, Automatic angle calculation and display in degrees, Comparison with normal reference database, Categorization of hip dysplasia (mild/severe), Save images for later review

**Features:** Vision Pro support

**In-app purchases:** none


### DIAX

[App page](https://appshunter.io/ios/app/diax-bone-age/id1296654435)

This medical app simplifies understanding wrist X-rays for bone age assessment. It uses simplified drawings and daily radiographs to help students and physicians quickly determine bone age based on gender and age group.

**Highlights:** Wrist X-ray analysis, Bone age assessment, Simplified drawings, Daily radiograph images, Gender and age group specific

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

**In-app purchases:** none


## Frequently asked questions

### Is AcetabularIndex free?

AcetabularIndex costs $2.99, with no in-app purchases.

### Is DIAX free?

DIAX costs $19.99, with no in-app purchases.

### Which has better reviews, AcetabularIndex or DIAX?

AcetabularIndex and DIAX are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do AcetabularIndex or DIAX have ads?

Neither AcetabularIndex nor DIAX shows ads.

### Which is updated more often, AcetabularIndex or DIAX?

AcetabularIndex ships an update every 11 months, and DIAX every 11 months. Most recently, AcetabularIndex was updated on October 7, 2026 and DIAX on October 16, 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.*