# ctDNA Study — Research Study App

> Research Study App (iPhone/iPad app by Hello Thread.)

- Source: https://appshunter.io/ios/app/ctdna-study/id6502943798 (this page in markdown: same URL + `.md`)
- Developer: [Hello Thread](https://appshunter.io/developer/996237890)
- Category: Medical, Health & Fitness
- Price: Free
- Age rating: 17+
- Requires: iOS 12.0 · 150 MB
- Languages: Afrikaans, Amharic, Arabic, Belarusian, Bulgarian, Croatian, Czech, Danish, Dutch, English and 37 more
- Released: 2024-06-06
- Data updated: 2026-09-06
- User reviews in markdown: https://appshunter.io/ios/app/ctdna-study/id6502943798/reviews.md

## What is ctDNA Study?

This is an ongoing prospective cohort study in which we will measure ctDNA specifically from older patients with ER+ breast cancer to monitor treatment response to primary endocrine therapy (the pills you are taking).


## Version history (last 2 releases)

### 1.2.19 — 2024-10-10

iOS 18 compatibility

### 1.0 — 2024-06-06

No release notes.

## More apps by Hello Thread

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- [Abbott SMBG Study](https://appshunter.io/ios/app/abbott-smbg-study/id1536721001)
- [T1D Trial](https://appshunter.io/ios/app/t1d-trial/id1540940479)

All apps by Hello Thread: https://appshunter.io/developer/996237890

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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 2026-09-06.*