Convert html to ionic

I already have an HTML app, can I convert it to Ionic in order to later import it into iOS and Android?

You don’t need to use Ionic to create iOS and Android apps, you can just use Capacitor.

Hi, thank you but I can’t find the price, is it for free?

Yes, it’s free, as Ionic Framework, but they are separate projects.
You can use any web framework with Capacitor or no framework at all.