# CarrotStage — TNM Staging for Clinicians

> TNM Staging for Clinicians (iPhone/iPad app by Mediprism.)

- Source: https://appshunter.io/ios/app/carrotstage/id6795402786 (this page in markdown: same URL + `.md`)
- Developer: [Mediprism](https://appshunter.io/developer/6793341676)
- Category: Medical
- Price: Free
- Age rating: 17+
- Requires: iOS 15.0 · 18 MB
- Languages: American English
- Released: 2026-08-11
- Data updated: 2026-10-05

## What is CarrotStage?

This app is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. Staging results are for reference only and must be verified by a qualified healthcare professional.


■ About CarrotStage

CarrotStage is a TNM cancer staging calculator for healthcare professionals. It implements published staging classification criteria: enter the T, N, and M components and the corresponding stage group is derived.

It is designed to reduce the time spent cross-referencing printed staging tables, and to show the reasoning behind each classification so results can be verified.


■ Coverage

Major cancers of the thoracic and head and neck regions. Currently includes lung, pleural mesothelioma, thymic epithelial tumors, nasopharynx, oropharynx (HPV-associated and p16-negative), salivary gland, and cervical nodes with unknown primary, with further sites added over time.

The current list of supported sites is available from the menu within the app.


■ Features

· Shows the reasoning, not just the answer
Rather than simply returning T2 or T3, the app shows which criterion produced that assignment, step by step. You can verify the result instead of taking it on trust.

· Blocks contradictory input by design
Selecting carcinoma in situ disables the nodal fields; with no positive nodes, the ENE switch is locked. Impossible combinations cannot be constructed in the first place.

· Separates clinical from pathological
cTNM and pTNM are classified differently. Switching tracks changes the input fields to match the applicable criteria.

· Does not hide what it is based on
Each site states the edition applied and what kind of source it is based on. Where published sources differ in interpretation, a warning explains which criteria were applied.


■ Privacy

· No internet connection is required for staging
· Nothing you enter is stored or transmitted
· No accounts, no sign-in, no advertising, no analytics
· No device permissions are requested

Given that it is used in clinical settings where patient information is handled, the app was built without any outbound communication path.


■ Intended Users

This app is intended for healthcare professionals, including physicians, pathologists, cancer registrars, and medical trainees. It is not a consumer health app and is not a tool for patient self-assessment.


■ Sources

Staging criteria for each site were implemented from the peer-reviewed literature in which the classification was published, together with official staging reference materials. The edition applied and the kind of source it is based on are shown at the bottom of each screen, so users can judge whether primary-source confirmation is warranted.

Staging classifications are subject to revision. Please consult the official publications of the relevant societies for current criteria.


■ Disclaimer

This app is not affiliated with, endorsed by, or certified by the American Joint Committee on Cancer (AJCC), the Union for International Cancer Control (UICC), or the International Association for the Study of Lung Cancer (IASLC).

Always consult a qualified healthcare professional for medical advice, diagnosis, or treatment.


■ Developer

Developed by Mediprism, a medical software company.


■ Contact

mediprism@mediprism.net

Please include your app version, device model, and the cancer site concerned. If a result appears inconsistent with the published criteria, please report it to the same address.

## Is CarrotStage safe?

Not enough ratings yet to assess CarrotStage.

## Is CarrotStage legit?

CarrotStage has limited verification signals. The AppsHunter Legitimacy Score for CarrotStage is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.3.0 — 2026-09-09

Coverage grows from 7 cancers to 13.

Newly added
· Lip and Oral Cavity
· Hypopharynx
· Nasal Cavity and Paranasal Sinuses
· Larynx (supraglottis, glottis, subglottis)
· Mucosal Melanoma of the Head and Neck
· Cutaneous Carcinoma of the Head and Neck

In all six, the criteria differ by primary site or histology. Choosing the site on the screen switches the input fields to the criteria for that site, and the edition applied and the source materials remain stated at the bottom of each screen.

Layout and usability
· On a tablet in landscape, inputs and results sit side by side. In portrait it stays a single column as before.
· On Android 13 and above, a language can be set for this app alone in system settings.
· Guidance on input fields has been revised. Notices that only apply under a condition now appear when that input is switched on, so what needs checking is clear at the point it matters.
· The result card and screen spacing were re-checked on a physical device and adjusted.

Staging logic and results are unchanged for the cancers already supported.

### 1.2.0 — 2026-08-30

English is now supported. The app follows your device language.

• New source materials screen. Tap the notice below a result to see the publications the staging classification comes from, or browse the full list by site from About (ⓘ).
• Clinical (c) / pathological (p) selection is now on every screen, and the prefix in the result follows your choice.
• Lung — selecting Post-therapy (y) changes the size field to Viable tumor size and shows the measurement guidance for excluding fibrosis and necrosis.
• Oropharynx — p16 testing guidance is now listed scenario by scenario.
• Some Korean terminology corrected against the standard medical dictionary.

Staging results and stage tables are unchanged in this update.

### 1.1.0 — 2026-08-23

■ 새 암종

경부림프절·원발불명(Cervical Nodes & Unknown Primary)을 추가했습니다. 원발 병소를 찾지 못한 상태에서 경부 림프절 전이만 확인된 경우의 병기를 판정합니다. 바이러스 상태(EBV·p16)에 따라 비인두암 또는 구인두암 기준으로 안내합니다.

■ 화면

· 암종 선택기를 부위(두경부·흉부)별로 묶어 표시합니다
· 한 줄 안의 세그먼트 라벨이 길이에 따라 글자 크기가 달라지던 문제를 개선했습니다
· 선택된 항목을 배경색과 굵은 글씨로 표시합니다
· 입력 라벨과 한글 보조 문구가 겹쳐 보이던 문제를 수정했습니다
· 계산 버튼 영역의 배경이 화면 너비에 맞게 표시됩니다

■ 판정 안내

· 폐 미세침습선암을 선택한 상태에서 침범·다발 결절 소견이 함께 입력되면, 소견을 다시 확인하도록 안내합니다
· 흉선 림프절 구역 문구를 근거 기준에 맞게 명확히 했습니다(전방 구역 = 저위 전경부, 심부 구역 = 폐문 10)

### 1.0.0 — 2026-08-12

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-05.*