# TrialMax App vs YPrime eCOA

The clearest difference is rating: YPrime eCOA at 2.8 against TrialMax App's 2.5. YPrime eCOA also leads on iOS requirement (12.0 vs 15.0). TrialMax App's advantage is update cadence (every 3 weeks vs every 2 months) and ratings volume (99 vs 14). On price, review sentiment, ads and in-app purchases there is nothing between them.

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

YPrime eCOA holds the better App Store score, 2.8 against 2.5. That said, the two scores are not equally well evidenced: TrialMax App has 99 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 5% of TrialMax App's written reviews are positive against 13% of YPrime eCOA's.

TrialMax App ships an update every 3 weeks, YPrime eCOA every 2 months. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | TrialMax App | YPrime eCOA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (99 ratings)](https://appshunter.io/ios/app/trialmax-app/id1002332076/reviews) | **[2.8 (14 ratings)](https://appshunter.io/ios/app/yprime-ecoa/id1521277112/reviews)** |
| Number of ratings | **99** | 14 |
| Positive reviews | 5.0% of reviews | **12.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 41 MB | 131 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Signant Health Oy](https://appshunter.io/developer/885378600) | [Y-Prime](https://appshunter.io/developer/872635320) |

## What reviewers say

### TrialMax App

[App page](https://appshunter.io/ios/app/trialmax-app/id1002332076)

Collect data from patients and caregivers in clinical trials for new medicines. Access study-specific questionnaires on the go, with reminders to help you follow the study protocol. Your privacy and anonymity are ensured.

**Highlights:** Patient and caregiver data collection, Study-specific questionnaires, On-the-go data entry, Study protocol reminders, Privacy and anonymity assured, Easy-to-use interface

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

**In-app purchases:** none


### YPrime eCOA

[App page](https://appshunter.io/ios/app/yprime-ecoa/id1521277112)

Access clinical study questionnaires on your personal device. Use your enrollment ID to log in and complete required training. The app reminds you of upcoming questionnaires based on your visit schedule, ensuring compliance with study requirements.

**Highlights:** Access study questionnaires, Personal device access, Enrollment ID login, Study-specific questionnaires, Visit schedule reminders, Compliance tracking

**In-app purchases:** none


## Frequently asked questions

### Is TrialMax App free?

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

### Is YPrime eCOA free?

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

### Which has better reviews, TrialMax App or YPrime eCOA?

YPrime eCOA is rated higher. TrialMax App averages 2.5 out of 5 from 99 ratings, while YPrime eCOA averages 2.8 from 14 ratings.

### Do TrialMax App or YPrime eCOA have ads?

Neither TrialMax App nor YPrime eCOA shows ads.

### Which is updated more often, TrialMax App or YPrime eCOA?

TrialMax App ships an update every 3 weeks, and YPrime eCOA every 2 months. Most recently, TrialMax App was updated on October 11, 2026 and YPrime eCOA on October 2, 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.*