# Clinical Trials 365 vs Protolinq

The clearest difference is update cadence: Protolinq at every 6 days against Clinical Trials 365's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Clinical Trials 365 ships an update every 4 months, Protolinq every 6 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Clinical Trials 365 | Protolinq |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (23 ratings)](https://appshunter.io/ios/app/clinical-trials-365/id6756089073/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 4 MB | 35 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Paid Trials, Inc.](https://appshunter.io/developer/1878186945) | [Digital Auxilius](https://appshunter.io/developer/1681992132) |

## What reviewers say

### Clinical Trials 365

[App page](https://appshunter.io/ios/app/clinical-trials-365/id6756089073)

Discover local clinical trial opportunities and explore new treatment options. This platform connects you with research organizations, allowing you to browse studies, check eligibility, and get in touch directly from your phone. It's a free and secure way to find and participate in clinical research.

**Highlights:** Browse clinical trials by condition, Search by location and study category, Save favorite studies, Contact research organizations, Get new study notifications, Verified organization listings

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

**In-app purchases:** none


### Protolinq

[App page](https://appshunter.io/ios/app/protolinq/id6761285102)

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

**In-app purchases:** none


## Frequently asked questions

### Is Clinical Trials 365 free?

Clinical Trials 365 is free to download, with no in-app purchases.

### Is Protolinq free?

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

### Do Clinical Trials 365 or Protolinq have ads?

Neither Clinical Trials 365 nor Protolinq shows ads.

### Which is updated more often, Clinical Trials 365 or Protolinq?

Clinical Trials 365 ships an update every 4 months, and Protolinq every 6 days. Most recently, Clinical Trials 365 was updated on November 5, 2026 and Protolinq on October 31, 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.*