iPhone Step Count vs Apple Watch Step Count

Is there a way to disable the iPhone from tracking step counts and allowing only the Apple Watch to track steps? I know you can set the priority in sources under Steps in the Health app but my Summary page keeps showing the total steps from the iPhone and Apple Watch combined and quite honestly I don't care about the iPhone steps it counted because I mostly walk around with just my watch. This tends to interfere with some of my older apps that are pulling step counts directly from the Health app. The only way I've found to kind of avoid it is by going into the data sources for Steps and telling it to delete the phone step count data when it shows up.