> I really like some of the health features on Apple Watch. But I won't buy it because I don't want it to be my watch, and I don't want to pair my Apple account with it. I just want the health features and nothing else.

I use an Oura ring because of this. I want 1) no notifications 2) passive health monitoring 3) no subscription

I was early enough to be grandfathered into no subscription. The app itself gets worse all the time as they try to do provide higher level guidance and make the data harder to see. But it still serves its purpose.

If I had to pay the monthly subscription I might would probably forgo the category altogether.