CTC vs ePRO by Mobile4D
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
CTC
This medical reference app provides quick access to standardized adverse event criteria and grading scales for oncology research. It allows for efficient logging, tracking, and reporting of patient events, including performance scores and custom entries. Data is kept strictly on-device for privacy and compliance.
- CTCAE v4 and v5 reference
- Performance score integration (Karnofsky, ECOG, Lansky)
- Advanced adverse event logger
- Custom event creation
- CSV data import/export
- On-device data storage
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CTC-AE is a reference and educational tool for clinical researchers, oncologists, and healthcare professionals working with adverse event terminology and oncology performance status scales. The app provides fast, offline access to publicly available standards: β’ NCI Common Terminology Criteria for Adverse Events (CTC-AE v4.03 and v5.0) β’ ECOG Performance Status β’ Karnofsky Performance Status β’ Lansky Performance Status (pediatric) You can also keep personal reference notes about trials and patients, stored privately in your own iCloud account and synced across your Apple devices. Export your data as CSV at any time. KEY FEATURES β’ Complete CTC-AE v4.03 and v5.0 terminology with grades and definitions β’ Color-coded severity grades for quick visual reference β’ Multi-column layout optimized for iPad β’ Performance status scales (ECOG, Karnofsky, Lansky) β’ Personal trial and patient reference notes, stored privately in your own iCloud account and synced across iPhone, iPad, and Mac β’ CSV export β’ Optional Face ID / Touch ID protection β’ Optional name scrambling for on-screen privacy PRIVACY Your reference notes live in your private iCloud container. Arpacore B.V. has no access to this data, and no information is shared with any third party. INTENDED USE CTC-AE is intended for educational and reference purposes only. It is not a medical device. It is not intended to diagnose, prevent, monitor, predict, prognose, or treat any disease, injury, or disability, and does not provide medical advice. All clinical decisions remain the sole responsibility of qualified healthcare professionals. The CTC-AE terminology is published by the U.S. National Cancer Institute and is reproduced here for reference. This app is not affiliated with, endorsed by, or sponsored by the NCI or NIH. CTC-AE is also available natively on Mac, with full sync between your devices.
ePRO by Mobile4D
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The ePRO app is developed as a student project at the University Bremen in Germany in cooperation with a project at the Mahidol University in Thailand. Our systemβs purpose is to provide a digital way of creating and sharing surveys with the participant of studies. These studies are conduct by our partners at the Mahidol University and their associates. The app is only designed for answering these surveys by the participants. The researchers use a web dashboard developed by us for creating and administrating the surveys. Therefore, the intended target audience are study participants of the projects at the Mahidol University. Since these studies cover long term developments of different events (without being able to go into too much detail here), they are always started in person with follow-up surveys in subsequent weeks and/or months. These initial in-person meetings are where the participants are provided with the QR code required for logging into their account in the app. The app is not intended for use by the general public outside of these studies. The basis for collecting the survey answers is covered by standard agreements between the researchers and the participants as common for academic studies.
Screenshots
Verdict
The clearest difference is price: ePRO by Mobile4D at Free against CTC's $3.99. ePRO by Mobile4D also leads on in-app purchases (none vs 1) and update cadence (fortnightly vs every 2 months). On ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
ePRO by Mobile4D is free to download; CTC costs $3.99 up front. CTC sells 1 one-off in-app purchase. ePRO by Mobile4D asks for nothing beyond the download.
CTC ships an update every 2 months, ePRO by Mobile4D fortnightly. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.
| Parameter | CTC | ePRO by Mobile4D |
|---|---|---|
| Price | $3.99 | Free β better |
| Positive reviews | 55.6% of reviews | β |
| Update frequency | Every 2 months | Fortnightly β better |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Monetization | Paid | β |
| Devices | iPhone, iPad, Mac β better | iPhone, iPod |
| Requires iOS | 17.6 | 12.0 β better |
| Further details β not scored | ||
| Size | 2 MB | 63 MB |
| Age rating | 17+ | 4+ |
| Developer | Arpacore B.V. | Universitat Bremen |
In-app purchases
CTC
- Adverse Event Logger$3.99
ePRO by Mobile4D
No in-app purchases







