# CT vs XRay

The clearest difference is review sentiment: CT at 100% against XRay's 33%. CT also leads on in-app purchases (none vs 3) and rating (4.5 vs 4.1). XRay's advantage is ads (none vs shown) and update cadence (monthly vs every 12 months). On price there is nothing between them.

Both are free to download. XRay sells 3 in-app purchases, starting at $3.99 per 7 days. CT asks for nothing beyond the download.

CT holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: XRay has 135 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 100% of CT's written reviews are positive against 33% of XRay's.

CT ships an update every 12 months, XRay monthly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | CT | XRay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (12 ratings)](https://appshunter.io/ios/app/ct-computed-tomography/id1562592280/reviews)** | [4.1 (135 ratings)](https://appshunter.io/ios/app/xray-sublux-anatomy-learning/id6738170494/reviews) |
| Number of ratings | 12 | **135** |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Monthly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 55 MB | 24 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [Fabricio Tarter](https://appshunter.io/developer/1533271635) | [European Apps Solutions](https://appshunter.io/developer/1633473927) |

## What reviewers say

### CT

[App page](https://appshunter.io/ios/app/ct-computed-tomography/id1562592280)

This app provides a didactic and effective way for students, radiologists, and bio-image graduates to learn and reinforce their knowledge of computed tomography protocols. It features a human body model with selectable protocols, detailing essential information for each study.

**Highlights:** Human body model for protocol selection, Detailed protocol information, Indications and preparation guidance, Scout view and FOV details, Cut thickness and gap information, Window settings and reconstruction plans, Protocol-specific images

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

**In-app purchases:** none


### XRay

[App page](https://appshunter.io/ios/app/xray-sublux-anatomy-learning/id6738170494)

Explore detailed X-ray images with interactive labels and in-depth explanations. Test your knowledge with quizzes and master human anatomy with high-resolution visuals. Ideal for students and professionals seeking to understand radiographic images.

**Highlights:** Interactive quizzes, Detailed image descriptions, Color-coded anatomy, High-resolution DICOM images, Progress tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Yearly Subscription | $17.99 | per year |
| Lifetime access | $29.99 | one-time |


## Frequently asked questions

### Is CT free?

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

### Is XRay free?

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

### Which has better reviews, CT or XRay?

CT is rated higher. CT averages 4.5 out of 5 from 12 ratings, while XRay averages 4.1 from 135 ratings.

### Do CT or XRay have ads?

CT shows ads; XRay does not.

### Which is updated more often, CT or XRay?

CT ships an update every 12 months, and XRay monthly. Most recently, CT was updated on November 3, 2026 and XRay on November 4, 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.*