Will a”Smart Watch “ not an Apple Watch work with my iPhone?

Most manufacturers of 3rd party smart watches also provide apps for the iPhone, which can pair the watch to your device and sync/transfer data to the Health App.

Did you already check the smart watch user guide about that?

Yeah, you can use other smartwatches than an Apple Watch with your iPhone.

Most of the time you will need an app for that, please refer to the smartwatches manual to find instructions on how to pair this particular Apple Watch with your iPhone

I have a smart watch and I would like to know if I could pair up with my iphone

Can’t seem to get my smart watch to connect to my iPhone