CTC vs MK2400
Price, ratings, monetisation and update history for both apps, side by side — 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: • NCI Common Terminology Criteria for Adverse Events (CTC-AE v4.03 and v5.0) • ECOG Performance Status • Karnofsky Performance Status • 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 • Complete CTC-AE v4.03 and v5.0 terminology with grades and definitions • Color-coded severity grades for quick visual reference • Multi-column layout optimized for iPad • Performance status scales (ECOG, Karnofsky, Lansky) • Personal trial and patient reference notes, stored privately in your own iCloud account and synced across iPhone, iPad, and Mac • CSV export • Optional Face ID / Touch ID protection • 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.
MK2400
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MSD MK2400-001 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
The clearest difference is price: MK2400 at Free against CTC's $3.99. MK2400 also leads on in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 2 months). On ads and device support 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
MK2400 is free to download; CTC costs $3.99 up front. CTC sells 1 one-off in-app purchase. MK2400 asks for nothing beyond the download.
CTC ships an update every 2 months, MK2400 every 2 weeks. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.
| Parameter | CTC | MK2400 |
|---|---|---|
| Price | $3.99 | Free — better |
| Positive reviews | 55.6% of reviews | — |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 83 MB |
| Age rating | 17+ | 12+ |
| Developer | Arpacore B.V. | ERT, INC |
In-app purchases
CTC
- Adverse Event Logger$3.99
MK2400
No in-app purchases
