WatchOS app with iOS app

I have an iOS phone educational sports app. There is one small section where the user can track their stats. It is a very minor part of the app (perhaps 1% of the app content). It would be perfect for a watchOS app on its own. Can I create a separate standalone watch app even when the content is included in my phone app when it is a very insignificant part of the iPhone app?

WatchOS app with iOS app
 
 
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