YPrime eCOA vs MK5684
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
YPrime eCOA
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.
- Access study questionnaires
- Personal device access
- Enrollment ID login
- Study-specific questionnaires
- Visit schedule reminders
- Compliance tracking
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Access study participant questionnaires easily and with minimal day to day disruption by downloading this app on your personal device. Using the enrollment ID provided by your medical professional, create your unique login code and complete your training to begin. The available questionnaires will be specific to your clinical study and the YPrime eCOA application will remind you when the questionnaires need to be completed based off your visit schedule. Use this app to meet clinical study questionnaire completion and compliance requirements.
MK5684
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MSD MK5684-003 eCOA App is intended for use collect patient reported outcomes relating to a clinical trial. Patients must be given accounts by a participating site in order to log in to the app.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | YPrime eCOA | MK5684 |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (14 ratings) — better | — |
| Positive reviews | 12.5% of reviews | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 131 MB | 85 MB |
| Age rating | 4+ | 12+ |
| Developer | Y-PRIME TECHNOLOGIES, LLC | ERT,INC |
In-app purchases
YPrime eCOA
No in-app purchases
MK5684
No in-app purchases
