# CT Registry Test Pro vs Clinical Tree

The clearest difference is ads: Clinical Tree at none against CT Registry Test Pro's shown. Clinical Tree also leads on update cadence (monthly vs every 2 months) and iOS requirement (13.0 vs 15.6). CT Registry Test Pro's advantage is ratings volume (214 vs 7). On price, rating, review sentiment and in-app purchases there is nothing between them.

Both are free to download. CT Registry Test Pro sells 1 one-off in-app purchase and Clinical Tree sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for CT Registry Test Pro against 5.0 for Clinical Tree. That said, the two scores are not equally well evidenced: CT Registry Test Pro has 214 ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 72% of CT Registry Test Pro's written reviews are positive against 80% of Clinical Tree's.

CT Registry Test Pro ships an update every 2 months, Clinical Tree monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | CT Registry Test Pro | Clinical Tree |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (214 ratings)](https://appshunter.io/ios/app/ct-registry-test-pro/id1518808012/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/clinical-tree/id6444689971/reviews)** |
| Number of ratings | **214** | 7 |
| Positive reviews | 72.2% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 93 MB | 83 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Edunorth L.L.C.](https://appshunter.io/developer/1496084172) | [Duc Nguyen](https://appshunter.io/developer/1698359793) |

## What reviewers say

### CT Registry Test Pro

[App page](https://appshunter.io/ios/app/ct-registry-test-pro/id1518808012)

Prepare for your ARRT® Computed Tomography (CT) technologist certification exam with over 900 practice questions. Test your knowledge across key categories, review explanations, track your progress, and study protocols to strengthen your foundation.

**Highlights:** Over 900 practice questions, ARRT® registry format testing, Detailed answer explanations, Study notes section, Review previous tests, All questions with answers, Statistics tracking, CT protocol guidelines

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access all the app features | $39.99 | one-time |


### Clinical Tree

[App page](https://appshunter.io/ios/app/clinical-tree/id6444689971)

Access a vast medical knowledge base with quick answers to health questions. Explore detailed information on symptoms, diseases, and treatments across numerous clinical specialties. Stay updated with daily new content and specialized databases.

**Highlights:** Instant medical answer search, Information on symptoms and treatments, Daily updated articles and videos, Over 1,000,000 specialized databases, Covers numerous clinical specialties, Aids students and teachers

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Single 9 package | $8.99 | one-time |
| Single 15 package | $14.99 | one-time |
| 6 month package | $19.99 | one-time |
| Single 19 package | $19.99 | one-time |
| Single 25 package | $24.99 | one-time |
| 1 year package | $29.99 | one-time |
| Tzu N package | $29.99 | one-time |
| Tne N package | $39.99 | one-time |
| Nne N package | $99.99 | one-time |
| Lifetime package | $99.99 | one-time |


## Frequently asked questions

### Is CT Registry Test Pro free?

CT Registry Test Pro is free to download, with in-app purchases available.

### Is Clinical Tree free?

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

### Which has better reviews, CT Registry Test Pro or Clinical Tree?

Clinical Tree is rated higher. CT Registry Test Pro averages 4.9 out of 5 from 214 ratings, while Clinical Tree averages 5.0 from 7 ratings.

### Do CT Registry Test Pro or Clinical Tree have ads?

CT Registry Test Pro shows ads; Clinical Tree does not.

### Which is updated more often, CT Registry Test Pro or Clinical Tree?

CT Registry Test Pro ships an update every 2 months, and Clinical Tree monthly. Most recently, CT Registry Test Pro was updated on November 3, 2026 and Clinical Tree on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*