# CJOrtho vs CupCalc

The clearest difference is in-app purchases: CJOrtho at none against CupCalc's 2. CupCalc's advantage is update cadence (fortnightly vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CupCalc sells 2 in-app purchases, starting at $12.99 per year. CJOrtho asks for nothing beyond the download.

CJOrtho ships an update every 6 months, CupCalc fortnightly. The most recent releases landed on September 15, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | CJOrtho | CupCalc |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 72 MB | 42 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Collège des Jeunes Orthopédistes](https://appshunter.io/developer/937704597) | [Zekko LLC](https://appshunter.io/developer/1889700014) |

## 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


### CupCalc

[App page](https://appshunter.io/ios/app/cupcalc/id6761444976)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CupCalc Express | $12.99 | per year |
| CupCalc Pro | $19.99 | per year |


## Frequently asked questions

### Is CJOrtho free?

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

### Is CupCalc free?

CupCalc is free to download, with in-app purchases available.

### Do CJOrtho or CupCalc have ads?

Neither CJOrtho nor CupCalc shows ads.

### Which is updated more often, CJOrtho or CupCalc?

CJOrtho ships an update every 6 months, and CupCalc fortnightly. Most recently, CJOrtho was updated on September 15, 2026 and CupCalc on September 20, 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.*