Important: This web app uses the Web Bluetooth API to connect directly to your smart watch or fitness device.
All data is processed locally in your browser — nothing is sent to any server. Health data is sensitive; use this tool responsibly and only with your own devices.
This runs only in browsers that support Web Bluetooth (Chrome, Edge, Opera on desktop/Android).
It requires a secure context (HTTPS or localhost). For testing, serve this file with a local server (e.g., Python: python -m http.server 8000).