# Rad Onc Calc vs Clinical Tree

The clearest difference is in-app purchases: Rad Onc Calc at none against Clinical Tree's 10. Clinical Tree's advantage is rating (5.0 vs 4.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Clinical Tree sells 10 one-off in-app purchases. Rad Onc Calc asks for nothing beyond the download.

Clinical Tree holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 12 and 7 respectively.

Rad Onc Calc ships an update every 6 weeks, Clinical Tree monthly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Rad Onc Calc | Clinical Tree |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (12 ratings)](https://appshunter.io/ios/app/rad-onc-calc/id1494077153/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/clinical-tree/id6444689971/reviews)** |
| Number of ratings | **12** | 7 |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 57 MB | 83 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Matthew Culbert](https://appshunter.io/developer/1435398886) | [Duc Nguyen](https://appshunter.io/developer/1698359793) |

## What reviewers say

### Rad Onc Calc

[App page](https://appshunter.io/ios/app/rad-onc-calc/id1494077153)

A radiation oncology calculator and reference tool for medical professionals. It provides quick access to essential calculations and treatment constraints.

**Highlights:** Radiation oncology calculations, Treatment constraints reference, Quick access to essential data, Comprehensive tool for professionals

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Rad Onc Calc free?

Rad Onc Calc is free to download, with no in-app purchases.

### Is Clinical Tree free?

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

### Which has better reviews, Rad Onc Calc or Clinical Tree?

Clinical Tree is rated higher. Rad Onc Calc averages 4.6 out of 5 from 12 ratings, while Clinical Tree averages 5.0 from 7 ratings.

### Do Rad Onc Calc or Clinical Tree have ads?

Neither Rad Onc Calc nor Clinical Tree shows ads.

### Which is updated more often, Rad Onc Calc or Clinical Tree?

Rad Onc Calc ships an update every 6 weeks, and Clinical Tree monthly. Most recently, Rad Onc Calc was updated on October 21, 2026 and Clinical Tree on October 24, 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.*