Should I start tracking from the phone or watch?

Hi,
New user here, I’m using a Samsung Gear S3, I have installed the sleep as android app for gear S3. The question I have is very simple: should I start tracking from the phone, watch or it is the same?

Thanks for your answer and for this great app.
L.

Hello, what ever you prefer ;)… many thanks…

Thanks!
It is exactly the same then.