Prelude ePRO vs ePASSPRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Prelude ePRO
This app allows clinical trial participants to submit data directly to the electronic data capture system. It removes the need for in-person visits, ensuring continuous data collection from participants.
- Direct data input
- Electronic data capture integration
- Eliminates on-site visits
- Continuous data collection
- Mobile clinical trial management
Read full descriptionHide full description
Prelude’s ePRO mobile app enables subjects participating in a clinical trial to input data directly into Prelude’s electronic data capture (EDC) system. The ePRO solution eliminates the need for an on-site visit so that you never miss another data point from a subject again.
ePASSPRO
Read full descriptionHide full description
ePASSPRO is a dedicated ePRO (Electronic Patient-Reported Outcomes) mobile application designed to help patients participating in clinical trials accurately log study data and manage their schedules. [Key Features] - Log prescribed medication dosing times and review past dosing history in real time to support accurate and consistent treatment adherence. - View study participation status and progress through a clear, visualized dashboard. - Clinic and study staff information: Access contact details and location information for the assigned clinical trial site. - Receive push notifications for medication schedules and questionnaire submission deadlines to improve protocol compliance. [Data Security & Privacy] - This app is available only to approved clinical trial participants, and user accounts are provided by the assigned clinical trial site. - All data is securely managed in compliance with international data protection and clinical research guidelines. - Personal patient information is not displayed within the app. - This app does not provide medical advice. Users should always follow instructions from their study doctor or clinical site.
Screenshots
Verdict
The clearest difference is iOS requirement: ePASSPRO at 13.0 against Prelude ePRO's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.
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.
Prelude ePRO ships an update every 11 days, ePASSPRO every 3 weeks. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.
| Parameter | Prelude ePRO | ePASSPRO |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 32 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Prelude Dynamics, LLC | KCRN Research |
In-app purchases
Prelude ePRO
No in-app purchases
ePASSPRO
No in-app purchases
Questions
Is Prelude ePRO free?
Is ePASSPRO free?
Do Prelude ePRO or ePASSPRO have ads?
Which is updated more often, Prelude ePRO or ePASSPRO?
Other comparisons
