# qcywatch-android: a QCY Watch GT2 client built from BLE protocol research

> qcywatch-android replaces the QCY companion app for the QCY Watch GT2 using BLE frames derived from the vendor app and captured watch traffic. It forwards notifications and weather, exports health data to Health Connect and saves workouts as TCX files; frame handling and parsers are implemented in Kotlin.

- Type: Case study
- Targets: App · Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/DhrubaDC1/qcywatch-android>
- Primary source: <https://github.com/DhrubaDC1/qcywatch-android/blob/de3b2acef13cb27eb5241aef0b64daa83ca1cd3e/README.md>
- Catalog page: <https://awesomerea.org/resources/qcywatch-android-case/>
- Record JSON: <https://awesomerea.org/resources/qcywatch-android-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/qcywatch-android-case/index.md)

## Requirements & limits

- **Prerequisites:** Android 13 or later and a QCY Watch GT2 are required for the documented setup.
- **Prerequisites:** The QCY app must be disabled or uninstalled before use because the watch connects to one app at a time.
- **Limits:** Other QCY watches are unconfirmed; firmware updates and several watch features remain outside the implemented scope.
- **License:** MIT License.

## Primary sources

1. <https://github.com/DhrubaDC1/qcywatch-android/blob/de3b2acef13cb27eb5241aef0b64daa83ca1cd3e/README.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.