# Open Access Helper vs Clinical Tree

The clearest difference is rating: Clinical Tree at 5.0 against Open Access Helper's 4.0. Clinical Tree also leads on review sentiment (80% vs 50%) and iOS requirement (13.0 vs 17.6). Open Access Helper's advantage is in-app purchases (none vs 10). 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. Open Access Helper asks for nothing beyond the download.

Clinical Tree holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 7 respectively. Written reviews point the same way: 50% of Open Access Helper's written reviews are positive against 80% of Clinical Tree's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Open Access Helper | Clinical Tree |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/open-access-helper/id1592826205/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/clinical-tree/id6444689971/reviews)** |
| Number of ratings | 4 | **7** |
| Positive reviews | 50.0% of reviews | **80.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 11 MB | 83 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Claus Wolf](https://appshunter.io/developer/1441254407) | [Duc Nguyen](https://appshunter.io/developer/1698359793) |

## What reviewers say

### Open Access Helper

[App page](https://appshunter.io/ios/app/open-access-helper/id1592826205)

Easily find legal, free versions of paywalled scientific articles using trusted APIs. Seamlessly connect to university library proxies like EZProxy and OpenAthens. This open-source tool respects your privacy and makes research more accessible.

**Highlights:** Find legal, free scholarly articles, Access paywalled research, Integrates with unpaywall.org and core.ac.uk, Seamless EZProxy/OpenAthens connection, Indicates version type (Published, Accepted, Submitted), Open-source and privacy-respecting

**Features:** Safari Extension, Vision Pro support

**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 Open Access Helper free?

Open Access Helper 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, Open Access Helper or Clinical Tree?

Clinical Tree is rated higher. Open Access Helper averages 4.0 out of 5 from 4 ratings, while Clinical Tree averages 5.0 from 7 ratings.

### Do Open Access Helper or Clinical Tree have ads?

Neither Open Access Helper nor Clinical Tree shows ads.

### Which is updated more often, Open Access Helper or Clinical Tree?

Open Access Helper ships an update monthly, and Clinical Tree monthly. Most recently, Open Access Helper was updated on September 15, 2026 and Clinical Tree on September 10, 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.*