CarrotStage vs CatchUpPath
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
CarrotStage
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A calculation tool implementing the published TNM staging classifications. It reports only what those classifications define; it does not make diagnostic, prognostic or treatment judgements. A calculated stage is reference material; medical judgement must always be confirmed by the treating clinician. ā About CarrotStage CarrotStage is a TNM cancer staging calculator for healthcare professionals. Enter the staging elements ā T, N, M and whatever else a chapter defines ā and it returns the stage group. It follows AJCC 9th / UICC 9th, and the 8th edition where that is still current for a cancer. It cuts out looking up and cross-checking staging tables at the point of care, and shows the reasoning alongside the result so it can be verified. ā Coverage The major cancers of the regions below. Coverage continues to expand. Thorax: Lung, Diffuse Pleural Mesothelioma, Thymus Head and neck: Nasopharynx, Oropharynx (HPV-associated and p16-negative), Hypopharynx, Larynx, Lip and Oral Cavity, Nasal Cavity and Paranasal Sinuses, Salivary Gland Carcinoma, Mucosal Melanoma of the Head and Neck, Cutaneous Carcinoma of the Head and Neck, Cervical Nodes & Unknown Primary Female reproductive organs: Ovary, Fallopian Tube & Primary Peritoneal, Corpus Uteri Carcinoma, Corpus Uteri Sarcoma, Cervix Uteri, Vulva, Vagina, Gestational Trophoblastic Neoplasm Upper gastrointestinal tract: Esophagus & Esophagogastric Junction, Stomach, Small Intestine The current list is always available from the menu at the top of the app. ā What it does Ā· Shows the reasoning, not just the answer It shows step by step which criterion produced T2 rather than T3, so the result can be verified instead of taken on trust. Ā· Makes contradictory input structurally impossible Choose carcinoma in situ and the nodal fields are disabled; with no nodes, the ENE switch locks. Impossible combinations are never formed. Ā· Keeps clinical and pathological apart cTNM and pTNM use different criteria. Switching track switches the input fields to match. Ā· Does not hide its sources Each cancer states the edition applied and the material behind it. Where sources read differently, a warning names the criterion this app applied. Ā· Korean and English, and a tablet layout In landscape a tablet shows inputs and result side by side. On Android 13 and above you can set a language for this app alone. ā Privacy Ā· Staging requires no internet connection Ā· Nothing you enter is stored or transmitted Ā· No accounts, no sign-in, no advertising, no usage analytics Ā· No device permissions are requested Used where patient information is handled, the app has no communication path at all. ā Who it is for Physicians, pathologists, cancer registrars, medical trainees and other healthcare professionals. It is not a consumer health information app, and it is not a tool for patient self-diagnosis. ā Sources Staging criteria were implemented from the literature that published each classification and from official staging materials. Each screen states the edition applied and the nature of the evidence, so you can judge whether to check the original. Classifications are revised over time. Please confirm the current criteria against the official materials of the responsible bodies. ā Notices This app is not affiliated with, endorsed by or certified by the AJCC (American Joint Committee on Cancer), the UICC (Union for International Cancer Control), the IASLC (International Association for the Study of Lung Cancer) or the CAP (College of American Pathologists). For medical advice, diagnosis or treatment, always consult a qualified healthcare professional. ā Developer Developed by Mediprism. ā Contact mediprism@mediprism.net Telling us the app version, device model and cancer concerned speeds things up. If a result seems to differ from the criteria, write to the same address. ā User manual https://mediprism.net/carrotstage/manual/
CatchUpPath
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CatchUpPath helps pathologists, pathology residents, and other professionals stay current with recent pathology literature. The app searches PubMed and Europe PMC daily across a curated selection of leading pathology, organ-specific, and general medical journals. Choose the topics, study designs, research phases, and journals relevant to you and receive a personal overview of new articles. With CatchUpPath you can: ⢠Quickly assess new pathology publications ⢠Filter across 21 training topics, including cytology, molecular diagnostics, dermatopathology, hematopathology, breast pathology, and neuropathology ⢠Select by study design, research phase, and journal ⢠Open articles with a clear overview of objective, methods, results, and conclusion in Dutch, English, or Spanish ⢠Search by title, author, abstract, topic, study design, and journal ⢠Save interesting articles ⢠Receive notifications when new articles match your preferences Summaries are based solely on information contained in the article. CatchUpPath does not add new research findings or alter reported numbers or results. CatchUpPath is intended as a literature-following aid and does not replace reading the original article, professional judgment, or clinical decision-making.
Screenshots
Verdict
The clearest difference is in-app purchases: CarrotStage at none against CatchUpPath's 2. CarrotStage also leads on iOS requirement (15.0 vs 17.0). CatchUpPath's advantage is update cadence (every 4 days vs every 10 days). On price, ads and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. CatchUpPath sells 2 one-off in-app purchases. CarrotStage asks for nothing beyond the download.
CarrotStage ships an update every 10 days, CatchUpPath every 4 days. Both last shipped on October 29, 2026.
| Parameter | CarrotStage | CatchUpPath |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | Every 4 days ā better |
| Ads | No | No |
| In-app purchases | No ā better | Yes |
| Devices | iPhone, iPad, iPod ā better | iPhone, iPad |
| Requires iOS | 15.0 ā better | 17.0 |
| Further details ā not scored | ||
| Size | 18 MB | 3 MB |
| Age rating | 17+ | 17+ |
| Developer | Mediprism | Sven van Egmond |
In-app purchases
CarrotStage
No in-app purchases
CatchUpPath
- Small coffee for the developer$1.99
- Large coffee for the developer$6.99
Questions
Is CarrotStage free?
Is CatchUpPath free?
Do CarrotStage or CatchUpPath have ads?
Which is updated more often, CarrotStage or CatchUpPath?
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