# YPrime eCOA vs MK5684

YPrime eCOA and MK5684 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

YPrime eCOA ships an update every 2 months, MK5684 every 5 weeks. The most recent releases landed on June 10, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | YPrime eCOA | MK5684 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (14 ratings)](https://appshunter.io/ios/app/yprime-ecoa/id1521277112/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 131 MB | 85 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Y-PRIME TECHNOLOGIES, LLC](https://appshunter.io/developer/872635320) | [ERT,INC](https://appshunter.io/developer/1160214546) |

## What reviewers say

### 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


### MK5684

[App page](https://appshunter.io/ios/app/mk5684-003/id6463236012)

**In-app purchases:** none


## Frequently asked questions

### Is YPrime eCOA free?

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

### Is MK5684 free?

MK5684 is free to download, with no in-app purchases.

### Do YPrime eCOA or MK5684 have ads?

Neither YPrime eCOA nor MK5684 shows ads.

### Which is updated more often, YPrime eCOA or MK5684?

YPrime eCOA ships an update every 2 months, and MK5684 every 5 weeks. Most recently, YPrime eCOA was updated on June 10, 2026 and MK5684 on September 19, 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.*