# Fyous 3D Scanner vs Castra App

The clearest difference is in-app purchases: Fyous 3D Scanner at none against Castra App's 4. Castra App's advantage is update cadence (weekly vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Castra App sells 4 in-app purchases, starting at $4.99 per month. Fyous 3D Scanner asks for nothing beyond the download.

Fyous 3D Scanner ships an update every 6 months, Castra App weekly. The most recent releases landed on October 9, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Fyous 3D Scanner | Castra App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free | — |
| Size | 28 MB | 66 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Itch Innovation UK Limited](https://appshunter.io/developer/1579285977) | [CASTRA APP OOD](https://appshunter.io/developer/1761241022) |

## What reviewers say

### Fyous 3D Scanner

[App page](https://appshunter.io/ios/app/fyous-3d-scanner/id1579285975)

Create custom-fit footwear by scanning your feet with your device. This app revolutionizes the orthopaedic footwear industry by reducing production time and costs while enhancing quality and style. Explore designs and purchase bespoke shoes online after scanning.

**Highlights:** 3D foot scanning, Custom-fit footwear production, Orthopaedic footwear industry innovation, Online shop integration, Reduced lead-times and costs

**Features:** macOS Compatibility

**In-app purchases:** none


### Castra App

[App page](https://appshunter.io/ios/app/castra-app/id6612004431)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Athlete Subscription | $4.99 | per month |
| Coach Monthly Subscription | $29.99 | per month |
| Athlete Annual Subscription | $49.99 | per year |
| Coach Yearly Subscription | $269.99 | per year |


## Frequently asked questions

### Is Fyous 3D Scanner free?

Fyous 3D Scanner is free to download, with no in-app purchases.

### Is Castra App free?

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

### Do Fyous 3D Scanner or Castra App have ads?

Neither Fyous 3D Scanner nor Castra App shows ads.

### Which is updated more often, Fyous 3D Scanner or Castra App?

Fyous 3D Scanner ships an update every 6 months, and Castra App weekly. Most recently, Fyous 3D Scanner was updated on October 9, 2026 and Castra App on October 22, 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.*