# TrialTrack vs PROBr

The clearest difference is in-app purchases: PROBr at none against TrialTrack's 1. PROBr also leads on device support (3 vs 1) and iOS requirement (15.0 vs 26.0). TrialTrack's advantage is update cadence (every 10 days vs every 6 weeks). On price and ads there is nothing between them.

Both are free to download. TrialTrack sells 1 one-off in-app purchase. PROBr asks for nothing beyond the download.

TrialTrack ships an update every 10 days, PROBr every 6 weeks. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | TrialTrack | PROBr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/probr-join-research-studies/id6756816674/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 6 weeks |
| Monetization | — | Free |
| Size | 17 MB | 44 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Daniel Chan](https://appshunter.io/developer/1554633035) | [PROBR COMP LTD](https://appshunter.io/developer/1863082616) |

## What reviewers say

### TrialTrack

[App page](https://appshunter.io/ios/app/trialtrack/id6470159968)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrialTrack - Premium | $4.99 | one-time |


### PROBr

[App page](https://appshunter.io/ios/app/probr-join-research-studies/id6756816674)

This platform connects individuals with researchers to facilitate more inclusive and accessible medical studies. It helps users find studies matching their health profiles, contribute to medical advancements, and potentially earn rewards or access care.

**Highlights:** Find research studies matching health profile, Join studies to advance medicine, Earn rewards or access free care, Track participation history, Receive study updates, Empower community through research representation

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

**In-app purchases:** none


## Frequently asked questions

### Is TrialTrack free?

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

### Is PROBr free?

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

### Do TrialTrack or PROBr have ads?

Neither TrialTrack nor PROBr shows ads.

### Which is updated more often, TrialTrack or PROBr?

TrialTrack ships an update every 10 days, and PROBr every 6 weeks. Most recently, TrialTrack was updated on October 12, 2026 and PROBr 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.*