So I tried it on one of my wordpress sites but I host it myself rather than at wordpress.org and couldn’t see how to get it to use that.

Maybe it’s more capable than my quick look suggested – the video demo looked significantly different from the interface I was seeing. I tried registering to see if I’d then get that interface but no.

Having said that even the demo doesn’t really seem to be, as the title of this page suggests, “Convert Your Website Into A Mobile App” looked more like “create a mobile website”.

And, in all honesty, how much use is a tool to Convert a Website Into A Mobile App?
Suppose a web page designed for a decent sized screen has as much content as a page of A4 paper and you want to display that at readable size on a screen 2 inches wide – the result is giong to be a narrow and enormously tall page. I’m sure it makes more sense to review the content and build a much simplified mobile version, just providing the main function.