# Nexus Spine vs CupCalc

The clearest difference is in-app purchases: Nexus Spine at none against CupCalc's 2. Nexus Spine also leads on iOS requirement (12.0 vs 15.1). CupCalc's advantage is update cadence (fortnightly vs every 2 months). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Nexus Spine against 5.0 for CupCalc. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Nexus Spine ships an update every 2 months, CupCalc fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Nexus Spine | CupCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/nexus-spine/id1465218381/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/cupcalc/id6761444976/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 42 MB | 42 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nexus Orthopaedics L.L.C.](https://appshunter.io/developer/1236866776) | [Zekko LLC](https://appshunter.io/developer/1889700014) |

## What reviewers say

### Nexus Spine

[App page](https://appshunter.io/ios/app/nexus-spine/id1465218381)

This medical application assists surgeons in spinal fixation procedures by providing guidance on screw insertion angles. It offers a tool to help ensure accurate placement during surgery. Further usage instructions are available on the developer's website.

**Highlights:** Screw insertion angle guidance, Spinal fixation procedures, Surgical assistance tool, Accuracy enhancement

**Features:** macOS Compatibility

**In-app purchases:** none


### CupCalc

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

This medical reference calculator assists orthopaedic surgeons and trainees in total hip arthroplasty by applying published mathematical formulas to compute acetabular cup targets. It provides detailed calculations based on pelvic incidence, sacral slope, and femoral mobility, with all data traceable to peer-reviewed literature.

**Highlights:** Acetabular cup target computation, Pelvic incidence and sacral slope analysis, Femoral mobility classification, Functional anteversion and inclination targets, Safe zone plot with CSI thresholds, Exportable PDF planning summary

**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 Nexus Spine free?

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

### Is CupCalc free?

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

### Which has better reviews, Nexus Spine or CupCalc?

Nexus Spine and CupCalc are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Nexus Spine or CupCalc have ads?

Neither Nexus Spine nor CupCalc shows ads.

### Which is updated more often, Nexus Spine or CupCalc?

Nexus Spine ships an update every 2 months, and CupCalc fortnightly. Most recently, Nexus Spine was updated on November 3, 2026 and CupCalc on October 31, 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.*