Data collection on Galaxy watch

I have question for health data collection on galaxy watch 3

Do I have to create an app within the Galaxy Watch 3 to send and receive health data between the app, or is it possible transmit and receive directly data through the interface between the smartphone app?

thank you

If you are talking about Samsung Health data you can’t do that. Samsung Health is a proprietary algorithm and there is no public API.

You can access the Tizen Sensors and create a companion app for your smartphone. But you need to determine the algorithm to change the sensor data to readable and applicable data.

There are examples in GitHub on all of this.

Samsung Developer Relations