# RI.HIP MODELER vs CupCalc

The clearest difference is in-app purchases: RI.HIP MODELER at none against CupCalc's 2. CupCalc's advantage is update cadence (fortnightly vs every 9 months) and device support (3 vs 1). On price and ads there is nothing between them.

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

RI.HIP MODELER ships an update every 9 months, CupCalc fortnightly. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | RI.HIP MODELER | CupCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rihip-modeler/id1545374190/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 190 MB | 42 MB |
| Requires iOS | 17 | **15.1** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Smith & Nephew](https://appshunter.io/developer/549124657) | [Zekko LLC](https://appshunter.io/developer/1889700014) |

## What reviewers say

### RI.HIP MODELER

[App page](https://appshunter.io/ios/app/rihip-modeler/id1545374190)

This medical application assists surgeons in planning total hip arthroplasty by visualizing patient images and analyzing spinopelvic mobility. It helps determine optimal acetabular cup placement based on patient-specific data and implant specifications, aiming to reduce impingement.

**Highlights:** Total Hip Arthroplasty planning, Acetabular cup rotational selection, Spinopelvic mobility analysis, Patient-specific pelvic tilt determination, Simulation database integration, Impingement reduction recommendations

**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 RI.HIP MODELER free?

RI.HIP MODELER is free to download, with no in-app purchases.

### Is CupCalc free?

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

### Do RI.HIP MODELER or CupCalc have ads?

Neither RI.HIP MODELER nor CupCalc shows ads.

### Which is updated more often, RI.HIP MODELER or CupCalc?

RI.HIP MODELER ships an update every 9 months, and CupCalc fortnightly. Most recently, RI.HIP MODELER was updated on October 12, 2026 and CupCalc on October 7, 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.*